this post was submitted on 16 Mar 2025
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Mark Rober just set up one of the most interesting self-driving tests of 2025, and he did it by imitating Looney Tunes. The former NASA engineer and current YouTube mad scientist recreated the classic gag where Wile E. Coyote paints a tunnel onto a wall to fool the Road Runner.

Only this time, the test subject wasn’t a cartoon bird… it was a self-driving Tesla Model Y.

The result? A full-speed, 40 MPH impact straight into the wall. Watch the video and tell us what you think!

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[–] [email protected] 95 points 5 days ago* (last edited 5 days ago) (45 children)

This is a very good test, and the car should have past. That said though, I hate the click bait format where they show a stupidly obvious cartoonish wall, when the real wall is way more convincing.

The Video:

That sort of clickbait is 100% sure to get a "do not recommend channel" from me, I'm so sick of it. And it's sad when the video has such a good point.

The Clickbait

I can see it's kind of funny, but it's misleading.

[–] [email protected] 48 points 5 days ago (22 children)

Have you heard of DeArrow? https://dearrow.ajay.app/

It's a browser extension that replaces clickbait thumbnails with good community sourced ones

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[–] [email protected] 8 points 5 days ago (9 children)

I disagree with this being a good test. Where on earth would you find a wall on a road with a fotorealistic continuation of the road printed on it? This would trick many human drivers. Self driving cars fail in many realistic situations that are a lot more concerning. This is just clickbait.

[–] [email protected] 25 points 5 days ago

Where on earth would you find a wall on a road with a fotorealistic continuation of the road printed on it?

Spoken like a man who has never relentlessly pursued a roadrunner, nor taken a wrong turn at Albuquerque.

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[–] [email protected] 17 points 5 days ago* (last edited 5 days ago) (2 children)

At this point everyone should know that YouTube thumbnails have no requirement for accuracy. It's more like an album cover.

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[–] [email protected] 92 points 5 days ago (8 children)

YouTubers - especially large channels like this - constantly A/B test with different thumbnails and stick with whatever one drives the most traffic (no pun intended) to the video.

You might not like it, but it’s unfortunately the reality of operating a content creation business on an algorithm-driven platform.

There are plenty of channels I follow that make fantastic videos, but sometimes you have to tolerate the shitty thumbnails because that’s just the reality of the system they’re operating within.

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[–] [email protected] 5 points 5 days ago

So its road runner rules in play here.

[–] [email protected] 4 points 5 days ago
[–] [email protected] 20 points 5 days ago
[–] [email protected] 2 points 5 days ago

Show someone footage of 9/11 and they‘ll think of 2001. Show someone footage of a burning or crashing Tesla 20 years from now and they‘ll think of 2025.

[–] [email protected] 12 points 5 days ago (1 children)

They obviously pre-cut the wall, probably for safety reasons, and they were like, let's make it a silly cartoon impact hole while we're at it.

Good job.

[–] [email protected] 30 points 5 days ago* (last edited 5 days ago)

Entire video is worth watching. He also snuck a chest mounted lidar into Disney and mapped some rides.

[–] [email protected] 283 points 5 days ago (11 children)

I seem to recall that fElon prevented the self driving team from utilizing LIDAR for any part of the system, instead demanding that everything run off of optical input. Does anyone else remember the same?

[–] [email protected] 59 points 5 days ago* (last edited 5 days ago) (5 children)

What's cool is that Teslas used to have radar sensors, at least, but Elon removed them from production to save money. Even if you have a car from back then, the software no longer uses them and they'll just physically unplug them the next time you have the car serviced, as it's just a drain on the battery at this point 🙃

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[–] [email protected] 12 points 5 days ago (1 children)

Came here to actually write this. Everyone remembers that. He made Tesler the hated shit it is today.

[–] [email protected] 9 points 5 days ago (1 children)

As a space nut I seriously hope that he never gets a chance to do anything similar with SpaceX. Thankfully he's mostly been kept away from important things thus far.

Don't get me wrong, I know SpaceX's closet is overflowing with skeletons. But since Congress has been so kind as to continuously cut NASA's budget for the last few decades, I have to rely on SpaceX and other private companies to keep our space endeavors going.

[–] [email protected] 6 points 5 days ago (1 children)

I'm (was) huge SpaceX nerd, but last year or so I'm less and less. He always was dumb narcissist asshole, but now I can't take it anymore. Also the idea that we've fucked up this planet and need to move somewhere else, by doing thousands of launches finishing this planet always made me sick. If someone would take him out, I probably would come back to liking the company.

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[–] [email protected] 21 points 5 days ago (7 children)

I remember there being claims from him or his team about lidar being a dead end that would not scale as well as computer vision.

[–] [email protected] 6 points 5 days ago

Yep! That's what I'm thinking of. It was Elmo. The real engineers objected.

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[–] [email protected] 63 points 5 days ago (5 children)

Iirc they were using a combination of lidar and radar, but Elmo wanted to cut costs.

[–] [email protected] 9 points 5 days ago

Ah okay. I was genuinely curious if I was remembering correctly because I definitely know it's been awhile since I'd read anything on the subject.

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[–] [email protected] 177 points 5 days ago (3 children)

Was just thinking this

A single LiDAR sensor prevents this kind of issue

[–] [email protected] 16 points 5 days ago (1 children)

I'm trying to find an article that covers what I remember but I know for sure that it's been a good while since I saw the info I recall. Hopefully I can dig something up.

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[–] [email protected] 77 points 5 days ago (1 children)

And that's what you get for cheaping out on tech and going with cameras over lidar. Not only that, but Tesla removed all the radar technology that literally every car uses for collision detection about a year ago.

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[–] [email protected] 15 points 5 days ago (1 children)

You all keep calling it wrong. It's pronounced Tesler.

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[–] [email protected] 13 points 5 days ago

Painted walls, the natural enemy of the Tesla.

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