Oh my lord! I'm absurdly impressed by the fact that he was actually riding that thing! I thought that maybe he'd just sit on it and roll down, but the thing actually pedals. That's some impressive engineering work. Speaking of engineering, I'm surprised that thing could hold his weight.
I've seen people build ultra tiny things with the help of electron microscopes, so I wonder if someone could build a microscopic bike now! Give microbial organisms a faster way to get around, haha.
Super cool post otherwise.