This is really cool to watch lol

I always imagined that the seat might break and fold on itself but I think the manufacturer thought of this. Also the missing safety wheels that should be on the back could have easily stopped him.
I've been in that situation a couple of times in the past actually with manual chairs and I hit my head but it wasn't my fault.

[media=https://youtu.be/mYpJZO5OPUU]