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In my fill the house with orange Hot Wheels track phase I ended up using marbles instead of cars.  Hundreds of colorful spheres speeding, twisting, curving, looping and jumping was an orchestra of pleasure.  Best physics lessons of my childhood.

Why is there only three comments but 600k views?

You should ask Guinness to verify the world record

Why no footage of the complete track run? That's literally the only thing I actually wanted to see.

I'm gonna write here becuase this has less comments. I love your content on your channels. If I could ask for anything, it would be that you consider making videos available in a higher resolution, like 1440p and/or 4k. Keep up the good work! The Rwanda video was especially inspiring and awesome. Thanks!

Remember, the only thing needed to break that record is one more segment of track (i do not know what to call it)

youve fufilled many guys dreams 🥲

I wish I had a space that big! I'm currently working on one in my house

I'd like a close up of how the switch back works.

Hey Mark you’re the best engineer ever I have seen in my entire lifetime!!!

Beware hot-wheels might rent a warehouse just to break this record

Hello Mark rober!

Nice Job Guys! Really a childhood dream

This is a flex not because he broke a world record, but because he clearly had more space he could have used to make it longer, but didn't. He wants somebody to break it, just so he can come back and upscale the project

BRO THIS WAS ALWAYS MY DREAMS AS A 5 YEAR OLD THIS WAS ALL I DID AND THOUGHT OF THIS MEANS SO MUCH TO ME

saddest longest track ever.

Animatic battle in the background

Mark, I'm from Brazil and you inspire me even more. davi

HOTWHEEL WHOOOOOOO