Luyện nói tiếng Anh bằng Shadowing qua video: Flying Phone Scam Exposed (so I built a REAL one)

Chọn chế độ luyện tập

Mỗi chế độ mở một phòng luyện tập toàn màn hình.

111 câu

Nếu các câu quá ngắn hoặc quá dài, hãy bấm Edit để chỉnh sửa.

- I saw this video on Twitter with over 5 million views, and then again on YouTube with nearly 1 million views.

Tôi đã xem video này trên Twitter với hơn 5 triệu lượt xem, và sau đó lại thấy nó trên YouTube với gần 1 triệu lượt xem.

Basically, this guy modified his cell phone case with propellers to take selfies, which is awesome.

Về cơ bản, anh chàng này đã chỉnh sửa ốp điện thoại của mình bằng cách gắn cánh quạt để chụp ảnh tự sướng, thật là tuyệt vời.

My only issue with it is that it's not only fake, but it's a scam, which I'll explain in a minute.

Điểm duy nhất tôi không hài lòng về nó là nó không chỉ là hàng giả, mà còn là một cái lừa đảo, điều mà tôi sẽ giải thích ngay sau đây.

But as for it being fake, the first clue is that these are three-volt, seven-millimeter microbrush motors like you see here.

Nhưng về việc nó là hàng giả, manh mối đầu tiên là đây là những động cơ chổi than siêu nhỏ 3 vôn, 7 mm giống như bạn thấy ở đây.

If you attach one to a beam like this and turn it on at full throttle, you'll see the most weight that it can lift is six quarters, or about 30 grams.

Nếu bạn gắn một chiếc vào một dầm như thế này và bật nó ở công suất tối đa, bạn sẽ thấy trọng lượng tối đa mà nó có thể nâng là sáu đồng xu 25 xu, tương đương khoảng 30 gam.

The cell phone in the video with all the flying gear attached would weigh about 300 grams, and since drones are typically designed to hover at 70% max thrust, you would need at least 15 of these motors to do what he did.

Chiếc điện thoại trong video với toàn bộ thiết bị bay gắn liền sẽ nặng khoảng 300 gam, và vì các máy bay không người lái thường được thiết kế để lơ lửng ở mức 70% lực đẩy tối đa, bạn sẽ cần ít nhất 15 động cơ như vậy để thực hiện được những gì anh ta đã làm.

But you know, this just doesn't look as catchy.

In fact, we recreated the exact setup he used in the video and turned the motors to full throttle and this is what happened.

Here it is in slow-mo, and as you can see, there's hardly any difference than if you don't turn the propellers on at all.

So I'm gonna show you how this scam artist somehow manages to break the laws of physics four more times in this three-minute video.

And then because obeying the laws of physics isn't optional, we're gonna call up fellow YouTuber Captain Disillusion to see if he can help a spot any signs of special effects.

And then with my buddy Peter Sripol, I'm gonna show you what it would take to actually build a flying selfie phone case, and then I'll put all the details on a new site I built using wix.com.

But before I do any of that, let me first explain why this is a scam and not just a harmless fake video for meaningless internet points.

With this many views and an astounding 80% like ratio, which means most people probably didn't realize it was fake, it's a statistical certainty that some young, aspiring engineer actually tried to build this themselves.

Worse than their parents' phone dropping like a rock and breaking, this might have been his or her first experience at making something.

But how, you might ask, would they know what components to use?

Well, here in the description, Amazing maker was kind enough to put links, Amazon affiliate links.

You can tell by the URLs.

So he is making money off the crest dreams of aspiring engineers without enough experience yet to know that this is total BS, and aspiring engineers are my people and you don't mess with my people.

(gun cocks) Let's do this.

(gun fires) The second gratuitous violation of physics comes in this scene.

Force of gravity always points down, but helicopter spinning blades create a force perpendicular to the blades themselves.

So if you want to hover, you need to be level so the forces will cancel out and you won't move.

If you tilt forward and then break the thrust force into its x and y components, you suddenly have an unbalanced force that will move you in that direction.

In essence, that's how helicopters move forward, by tipping forward.

In other words, it's physically impossible to hover in an orientation like this.

The forward thrust component is unbalanced, and it would have to move the phone forward.

The third major issue is the Arduino-compatible circuit board he chose.

It's the same board here, and it's supposed to be the brains for the drone.

Yet this specific model of board doesn't come with any sort of gyroscope or accelerometer.

Here's why that matters.

If you've ever tried balancing something on your hand like this, you and your body were creating what's referred to as a closed loop feedback control system.

So if it starts to tip over, my eyes relay that to my brain and my hand says, "Hey, I'm no longer feeling the weight just up and down.

It's also pushing my hand this way." And so my brain takes all that information and responds by telling my hand to move this way at a specific speed in order to compensate.

So to keep this thing balanced, there's this continuous loop of quickly gathering information, and then making real-time adjustments.

And closed feedback loops are used all over in engineering, from the simple case of a thermostat that continuously checks the air and turns on at a certain temperature, to dartboards that update their position 200 times a second to get a bullseye every time.

(bell dings) To machines that are abused, and most certainly for anything that flies and needs to stay in the air.

The fact that his board is missing a gyroscope and an accelerometer means there's no way for it to tell if it's starting to rotate or to fall in any direction.

It's the equivalent of trying to balance the board wearing a blindfold and an oven mitt.

You have no idea what adjustments to make to keep things balanced.

(cat meows) Which is the perfect lead-in to the fourth major physics flaw.

Notice how he attaches these motors and rigidly fixes them to the phone with double-stick tape.

This means if you start to tip forward, you have no way to self-correct the phone orientation, and it would just turn into a nose dive.

If you only have two propellers in this configuration, they both need to be able to rotate with respect to the phone in order to correct for movements in all six degrees of freedom.

For example, if it starts to tip forward, you could rotate them both back like this to correct for that.

Or if the wind is trying to spin the phone this way, they could assume this configuration to counter that.

To return to our balancing shovel analogy, by fixing the motors directly to the case, you lose your ability to even make corrections.

So not only do you have no idea where to move, but your arm is locked out from making adjustments anyways, which makes it literally impossible to balance.

(shovel clangs) Ow.

And my final physics issue with this video is one of acoustics.

This guy proposes using it as a hands-free way to watch your favorite, super hip music videos, conveniently dubbing over the audio here.

(upbeat music) (singers singing in foreign language) For reference, this is what an episode of "The Office" would sound like on a phone at full volume.

(actor talking) (propellers buzzing) And don't forget, you would actually need 13 more motors than this, so it would be at least six times louder.

So now we've thoroughly established a multitude of physical laws have been broken, let's find out exactly how he faked it.

And to do that, I've arranged a video call with the undisputed heavyweight champion of debunking fake videos using special effects, Captain Disillusion.

- Make sure to get it as flush as possible against your skin to minimize folds that might make it hard to chroma key out, like this.

(Mark clears throat) Nice and tight.

Mmm. - Captain!

- Oh, hi, Mark.

Mark Rober! You weren't supposed to call yet.

- It's two o'clock.

I'm actually even five minutes late.

- Really? Well then.

(objects whirring) How can I help you?

- Did you not even watch the video I sent?

- Ah, yes, of course.

The mobile drone video.

I've analyzed it thoroughly, Mark, and my conclusion is it's totally real.

- Seriously?

- Yes, everything except for the mobile drone part, that's fake.

If you look very closely, you might just be able to make out the huge, shadowing mask on the side of the phone, visible in every shot of it flying.

The creator must have been in a real hurry because it's so messy.

Here, it cuts off the edge of the phone.

Here, the tip of his finger.

And here, it reveals the thing it's supposed to be hiding, a rod.

It's narrow and light colored, and probably attached with the same mounting tape he used to tack on all the other gadgets.

That's why he's able to grab and adjust the phone in this shot.

By the river, the mask hides not just the stick, but the whole person holding it.

Look closer.

On this side, the real-time water, and on this side, a still frame from an empty version of the shot.

And if we track the phone's position and rotation, we can easily reverse engineer exactly how the stick puppeteer did, rotating mostly from the point where it was held.

- Wow, that was very impressive, Captain D.

Thank you for taking the time- - My favorite part of this whole thing is the audio.

The tiny propellers must have made so little noise at a distance, it didn't give a proper drone vibe.

So the hoaxers recorded the sound of the motors up close, and reused the same clip in every scene, complete with their muttering voices in the background.

(drone whining) (drone whining) (drone whining) - Awesome.

Well, thanks again for- - But even more impressive is the number of posts, messages, and tweets presumably from people with functioning eyeballs asking me if this painfully obvious edit is real, over and over.

- Okay, Captain, well, take care.

I've gotta go back to my- - Even you, Mark!

How could you do this to me?

How could you do- - He's such a joker. (laughs) So it's fake, and now you know exactly all the reasons why, but it's still a really interesting idea.

And I was curious what it would look like if you actually built one of these using less special effects and more practical engineering.

So naturally, I called in my buddy, Peter Sripol whose qualifications include building his own electric plane from scratch, and he immediately got to work.

(bright music) Turns out if you take two brushless motors, two electronic motor speed controllers, a flight controller that actually has a gyroscope and an accelerometer integrated, a 3D-printed frame, and two servos to articulate the rotors, a radio transmitter for a remote control, and a four-cell lipo battery, and then you put them all together, it actually works.

(propeller whining) (machine clattering) Kind of.

We had to do a bunch of test flights to calibrate that feedback control loop we talked about before.

So if we notice the drone is either undercompensated or overcompensating when it starts to fall in a certain way, we tweak the response sensitivity in between flights until we get to the sweet spot.

And I should mention, remember how the motors from the fake video could barely lift only six quarters?

Well, if you properly size them for the task at hand, they should be able to lift 150 quarters.

100

And so once we felt like we had it in pretty good shape, we took her out for the maiden test flight.

101

(gentle music) (camera shutter snaps) (camera shutter snaps) (gentle music) In our defense, it was a little windy out there, but as you can see, it could be pretty wobbly at times.

102

The truth is, a bi-copter like this totally works.

103

It just isn't a great design choice.

104

The reason pretty much all camera drones are quad-copter is because they're much more stable due to a larger footprint shared between four motors.

105

And by getting clever with a throttle speeds, you can move in all six degrees of freedom with no moving parts.

106

So there you go, with solid engineering, you don't need hidden rods or masking and rotoscoping, and Sir Isaac Newton can once again comfortably rest in his grave.

107

So the moral of the story is just don't cheat and lie and scam.

108

I actually considered going a little easier on Amazing maker, but then I happened to scan some of his other videos, like this knee brace that charges your phone and even powers this flashlight as you walk.

109

In theory, I'll skip the details, but in reality, this system would also never work as shown, which is why if you rewind that and stabilize on his hand in the pocket you see him click a hidden flashlight switch.

110

Thanks for watching.

111

(bright music) (children yelling) (snowballs striking) (Mark yelps) More tape!

Tải Ứng Dụng

Mọi thứ bạn cần để nói trôi chảy

Chấm điểm AIChấm từng câu nói

Luyện IPAThành thạo mọi âm

Từ vựngMở rộng vốn từ

Game Từ vựngHọc qua chơi

Quét QR

Download on theApp Store Get it onGoogle Play

Cùng kênh

FOR YOU

Video gợi ý

233 câu

Can You Fool A Self Driving Car?

Business EnglishTeensDaily Conversation

29 câu

How to build a startup in one month | Pieter Levels and Lex Fridman

Business EnglishUniversity StudentsWorking Adults

340 câu

I lowballed people on Facebook Marketplace 2

Business EnglishDaily ConversationUniversity Students

11 câu

iPhone 17 Pro Max Review - 6 Months Later

Business EnglishUniversity StudentsWorking Adults

212 câu

I Built a Fully Autonomous Flying Umbrella

Business EnglishUniversity StudentsWorking Adults

25 câu

Do these Viral Recipes Really Work? Let’s Test Them

Business EnglishDaily ConversationUniversity Students

42 câu

How to get a Million YouTube Subscribers in 100 Seconds

Business EnglishUniversity StudentsWorking Adults

440 câu

I Robbed a Billionaire & They Still Worship ME!

Business EnglishDaily ConversationUniversity Students

229 câu

I Fixed 100 Famous Logos

Business EnglishUniversity StudentsWorking Adults

532 câu

your home router STILL SUCKS!! (use OPNsense instead)

Business EnglishUniversity StudentsWorking Adults

116 câu

Bitcoin Is a Brilliant Scam and I Can Prove It (Again)

Business EnglishUniversity StudentsWorking Adults

65 câu

It’s not you. Phones are designed to be addicting.

Business EnglishUniversity StudentsWorking Adults

Từ vựng và ghi chú luyện nói cho bài học này

Bài luyện nói trình độ B2 này dựa trên video “Flying Phone Scam Exposed”. Những từ được nhắc lại nhiều nhất trong bài: motor, drone, fake. Video này có 111 câu và 2067 từ để luyện shadowing. Phần lời nói dài 10:54. Người nói nói nhanh, khoảng 190 từ mỗi phút, nên sẽ có nhiều chỗ nối âm và nuốt âm. Chỉ 81% số từ nằm trong 3.000 từ tiếng Anh thông dụng nhất, nên từ vựng khá khó.

Từ vựng quan trọng trong video

15 từ khó nhất trong video, kèm phiên âm và nghĩa:

Từ	Phiên âm	Nghĩa
propeller danh từ	/pɹəˈpɛl.ə/	cánh quạt, chân vịt
whine động từ	/ˈwaɪ̯n/	than vãn
scam danh từ	/ˈskæm/	trò lừa đảo
adjustment danh từ	/əˈd͡ʒʌst.mənt/	sự điều chỉnh
flashlight danh từ	/ˈflæʃˌlaɪt/	đèn pin
shovel danh từ	/ˈʃʌv.əl/	mai, xẻng
gram danh từ	/ˈɡɹæm/	gam
configuration danh từ	/kənˌfɪɡ.əˈɹeɪ̯.ʃən/	cấu hình
helicopter danh từ	/ˈheliːˌkɔptə(ɹ)/	máy bay lên thẳng, máy bay trực thăng
gentle tính từ	/ˈd͡ʒɛntl̩/	nhẹ nhàng
blade danh từ	/bleɪd/	lưỡi
bullseye danh từ	/ˈbʊlzaɪ/	hồng tâm
dubbing danh từ	/ˈdʌbɪŋ/	lồng tiếng
eyeball danh từ	/ˈaɪ.bɔl/	cầu mắt, nhãn cầu
millimetre danh từ		milimet

Những câu đáng luyện lại

Các câu ngắn, trọn ý trong video mà bạn có thể dùng lại khi giao tiếp hằng ngày:

You weren't supposed to call yet.
I'm actually even five minutes late.
How could you do this to me?

Ngữ pháp trong video

Những cấu trúc người nói dùng nhiều nhất, kèm đúng cụm từ trong video:

Cấu trúc	Trong video
Câu bị động be + quá khứ phân từ — nhấn vào việc xảy ra, không phải người làm	is unbalanced · are abused · is locked
Thì hiện tại hoàn thành have/has + quá khứ phân từ — việc đã xảy ra nhưng còn liên quan đến hiện tại	you've ever tried · have been broken · I've arranged
Mệnh đề quan hệ who / which + mệnh đề — thêm thông tin về người hoặc vật	selfies, which is · ratio, which means · anyways, which makes

Phát âm cần chú ý

Người nói dùng 32 dạng rút gọn, ví dụ don't, I'm, gonna. Hãy nói theo dạng ngắn đúng như bạn nghe.

Âm “th”: throttle /ˈθɹɔ.tl̩/, thrust /θɹʌst/, thoroughly /ˈθʌɹ.ə.li/
Âm “sh” và “zh”: flashlight /ˈflæʃˌlaɪt/, shovel /ˈʃʌv.əl/, shutter /ˈʃʌtəː/, configuration /kənˌfɪɡ.əˈɹeɪ̯.ʃən/, orientation /ˌɔː.ɹi.ənˈteɪ.ʃən/
Từ dài — đặt trọng âm cho đúng: accelerometer /ækˌsɛl.əˈɹɑ.mə.tɚ/, configuration /kənˌfɪɡ.əˈɹeɪ̯.ʃən/, orientation /ˌɔː.ɹi.ənˈteɪ.ʃən/, helicopter /ˈheliːˌkɔptə(ɹ)/, gratuitous /ɡɹəˈtu.ɪt.əs/

Những âm người Việt thường gặp khó:

Cụm phụ âm cuối — đọc đủ từng âm, đừng nuốt âm cuối: thrust /θɹʌst/, adjustment /əˈd͡ʒʌst.mənt/, astound /əˈstaʊnd/, blindfold /ˈblaɪ̯ndfɔʊ̯ld/, dartboard /ˈdɑɹtbɔːɹd/
Âm /tʃ/, /dʒ/ và /ʒ/ — tiếng Việt không có, đừng đọc thành “ch” hay “gi”: gyroscope /ˈd͡ʒaɪ.ɹəˌskoʊp/, adjustment /əˈd͡ʒʌst.mənt/, attach /əˈtæt͡ʃ/, gentle /ˈd͡ʒɛntl̩/, catchy /ˈkæt͡ʃi/
Âm /æ/ — mở miệng rộng hơn âm “e”: scam /ˈskæm/, accelerometer /ækˌsɛl.əˈɹɑ.mə.tɚ/, flashlight /ˈflæʃˌlaɪt/, attach /əˈtæt͡ʃ/, gram /ˈɡɹæm/

Cách luyện với video này

Nghe hết video một lần, chưa cần nói, và ghi lại những từ bạn chưa biết.
Bắt đầu ở tốc độ 0,75×, nói đuổi từng câu, rồi quay lại tốc độ bình thường khi đã quen.
Ghi âm giọng mình rồi so với bản gốc, chú ý các từ như propeller, whine, scam.

Phương Pháp Shadowing Là Gì?

Shadowing là kỹ thuật học ngôn ngữ có cơ sở khoa học, ban đầu được phát triển cho chương trình đào tạo phiên dịch viên chuyên nghiệp và được phổ biến rộng rãi bởi nhà đa ngôn ngữ học Dr. Alexander Arguelles. Nguyên lý cốt lõi đơn giản nhưng cực kỳ hiệu quả: bạn nghe tiếng Anh của người bản xứ và lặp lại to ngay lập tức — như một "cái bóng" (shadow) đuổi theo người nói với độ trễ chỉ 1–2 giây. Khác với luyện ngữ pháp hay học từ vựng bị động, Shadowing buộc não bộ và cơ miệng phải đồng thời xử lý và tái tạo ngôn ngữ thực tế. Các nghiên cứu khoa học xác nhận phương pháp này cải thiện đáng kể phát âm, ngữ điệu, nhịp điệu, nối âm, kỹ năng nghe và độ lưu loát khi nói — đặc biệt hiệu quả cho người luyện IELTS Speaking và muốn giao tiếp tiếng Anh tự nhiên như người bản ngữ.

Phương pháp shadowing: đọc hướng dẫn từng bước đầy đủ →

Luyện nói tiếng Anh bằng Shadowing qua video: Flying Phone Scam Exposed (so I built a REAL one)

Chọn chế độ luyện tập

Tải Ứng Dụng

World's Tallest Elephant Toothpaste Volcano

How to Escape Alcatraz With Basic Engineering

3 Levels of Car Theft

1st place Egg Drop project ideas- using SCIENCE

I Discovered a Lost Plane

Drinking Nasty Swamp Water (to save the world)

How To Keep a Skyscraper From Falling Over

This Ball is Impossible to Hit

My Puzzle Robot is 200x Faster Than a Human

Can You Safely Drink Your Own Pee?

Backyard Squirrel Maze 2.0- The Walnut Heist

Last Cheater Standing Wins $10,000!

Bare Hand Bottle Busting- Science Investigation

Engineers vs Junkyard RC Car Death Match

Automatic Bullseye, MOVING Dartboard

How to Survive a Grenade Blast

Feeding Bill Gates a Fake Burger (to save the world)

Unbreakable Ice Cream Safe

How To See Germs Spread Experiment (Coronavirus)

Backyard Squirrel Maze 1.0- Ninja Warrior Course

Can You Fool A Self Driving Car?

How to build a startup in one month | Pieter Levels and Lex Fridman

I lowballed people on Facebook Marketplace 2

iPhone 17 Pro Max Review - 6 Months Later

I Built a Fully Autonomous Flying Umbrella

Do these Viral Recipes Really Work? Let’s Test Them

How to get a Million YouTube Subscribers in 100 Seconds

I Robbed a Billionaire & They Still Worship ME!

I Fixed 100 Famous Logos

your home router STILL SUCKS!! (use OPNsense instead)

Bitcoin Is a Brilliant Scam and I Can Prove It (Again)

It’s not you. Phones are designed to be addicting.

Từ vựng và ghi chú luyện nói cho bài học này

Từ vựng quan trọng trong video

Những câu đáng luyện lại

Ngữ pháp trong video

Phát âm cần chú ý

Cách luyện với video này

Phương Pháp Shadowing Là Gì?