I should probably point out but I seen this on another subreddit and someone said this:

OK so what really happens is those monkeys get put on a toy bike (that doesn't have an engine) and a collar with a rope on it. The owner then yanks the cord so the monkey flies from one end of the street to the other while steering.

Pretty cruel and that's probably why the monkey is so strung out. You can see the owner trying to pull back on the cord and he pulls the monkey while it hangs on to the kid, and in the start yanking the cord to propel the bike

here you can see an example It's some real Raiders of the Lost Ark shit