跟读练习: Flying Phone Scam Exposed (so I built a REAL one) - 通过视频学习英语口语

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

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

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

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

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.

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.

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.

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It just isn't a great design choice.

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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.

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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!

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本课的词汇与口语要点

这节 B2 级别的口语课以视频“Flying Phone Scam Exposed”为素材。视频中反复出现的词有：motor, drone, fake。这段视频共有 111 个句子、2067 个单词可供跟读。讲话部分时长为 10:54。说话人语速较快，每分钟约 190 个词，会出现较多连读和弱读。只有 81% 的单词属于英语最常用的 3,000 词，词汇难度较高。

视频中的重点词汇

视频中最难的 15 个单词，附发音和释义：

单词	发音	释义
drone 名词	/dɹoʊn/	雄蜂
propeller 名词	/pɹəˈpɛl.ə/	螺旋槳 /螺旋桨
rotate 动词	/ˈɹoʊ.teɪt/	旋转, 转动
scam 名词	/ˈskæm/	詭計 /诡计, 騙局 /骗局
accelerometer 名词	/ækˌsɛl.əˈɹɑ.mə.tɚ/	加速度計 /加速度计
aspire 动词	/əˈspaɪɚ/	熱望 /热望, 渴望
gyroscope 名词	/ˈd͡ʒaɪ.ɹəˌskoʊp/	陀螺儀 /陀螺仪, 迴轉儀 /回转仪
throttle 名词	/ˈθɹɔ.tl̩/	風門 /风门, 節流閥 /节流阀
thrust 动词	/θɹʌst/	推力
adjustment 名词	/əˈd͡ʒʌst.mənt/	調整 /调整
flashlight 名词	/ˈflæʃˌlaɪt/	手電筒 /手电筒, 電筒 /电筒
shovel 名词	/ˈʃʌv.əl/	鏟子 /铲子, 鐵鍬 /铁锹
shutter 名词	/ˈʃʌtəː/	護窗板 /护窗板, 窗板
attach 动词	/əˈtæt͡ʃ/	附上, 附
gram 名词	/ˈɡɹæm/	克, 公克

视频中出现的短语动词

单词	发音	释义
cut off 动词	/ˌkʌt ˈɔf/ [ˌkɐɾ ˈɔf]	切下, 割下
find out 动词		找出, 查明
make out 动词	/meɪk aʊt/	派遣
turn out 动词		原來 /原来

值得反复跟读的句子

视频中简短而完整的句子，可以直接用在日常对话里：

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

视频中的语法

说话人最常用的结构，并附上视频中的原话：

结构	视频中的用法
被动语态 be + 过去分词 — 强调发生了什么，而不是谁做的	is unbalanced · are abused · is locked
现在完成时 have/has + 过去分词 — 过去发生但与现在仍有关联的事	you've ever tried · have been broken · I've arranged
定语从句 who / which + 从句 — 补充说明人或事物	selfies, which is · ratio, which means · anyways, which makes

需要注意的发音

说话人用了 32 次缩略和弱读形式，例如 don't, I'm, gonna。请按听到的简短形式来说。

“th” 音: throttle /ˈθɹɔ.tl̩/, thrust /θɹʌst/, thoroughly /ˈθʌɹ.ə.li/
“sh” 和 “zh” 音: flashlight /ˈflæʃˌlaɪt/, shovel /ˈʃʌv.əl/, shutter /ˈʃʌtəː/, configuration /kənˌfɪɡ.əˈɹeɪ̯.ʃən/, orientation /ˌɔː.ɹi.ənˈteɪ.ʃən/
长单词——注意重音位置: accelerometer /ækˌsɛl.əˈɹɑ.mə.tɚ/, configuration /kənˌfɪɡ.əˈɹeɪ̯.ʃən/, orientation /ˌɔː.ɹi.ənˈteɪ.ʃən/, helicopter /ˈheliːˌkɔptə(ɹ)/, gratuitous /ɡɹəˈtu.ɪt.əs/

中文母语者容易读错的音：

/v/ — 不要读成 /w/，上齿轻触下唇: hover /ˈhɒvə/, shovel /ˈʃʌv.əl/, conveniently /kənˈvinjəntli/, heavyweight /ˈhɛ.vi.weɪt/, vibe /vaɪb/
词尾辅音 — 要读清楚，后面不要加元音: rotate /ˈɹoʊ.teɪt/, gyroscope /ˈd͡ʒaɪ.ɹəˌskoʊp/, thrust /θɹʌst/, adjustment /əˈd͡ʒʌst.mənt/, flashlight /ˈflæʃˌlaɪt/
/r/ 和 /l/ 的区别: propeller /pɹəˈpɛl.ə/, accelerometer /ækˌsɛl.əˈɹɑ.mə.tɚ/, throttle /ˈθɹɔ.tl̩/, thoroughly /ˈθʌɹ.ə.li/, helicopter /ˈheliːˌkɔptə(ɹ)/

如何用这段视频练习

先完整听一遍视频，不要开口，记下不认识的单词。
先用 0.75 倍速逐句跟读，熟练之后再回到正常速度。
录下自己的声音并与原声对比，特别注意 drone, propeller, rotate 这类单词。

什么是跟读法？

跟读法 (Shadowing) 是一种有科学依据的语言学习技巧，最初开发用于专业口译员的培训，并由多语言者Alexander Arguelles博士普及。这个方法简单而强大：您在听英语母语原声的同时立即大声重复——就像是一个延迟1-2秒紧跟说话者的影子。与被动听力或语法练习不同，跟读法强迫您的大脑和口腔肌肉同时处理并模仿真实的讲话模式。研究表明它能显着提高发音准确性，语调，节奏，连读，听力理解和口语流利度——使其成为雅思口语备考和真实英语交流最有效的方法之一。

影子跟读法: 阅读完整分步指南 →

跟读练习: Flying Phone Scam Exposed (so I built a REAL one) - 通过视频学习英语口语

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