When shopping for a bike, I take it down a steep hill to see how it handles at speed. Not every bike does well. Don't know about the bike in question. I do re

When shopping for a bike, I take it down a steep hill to see how it handles at speed. Not every bike does well. Don't know about the bike in question. I do remember the hill. Anyway the manufacturer's lawyers will point out that the bike was not properly assembled (and I bet there's plenty of lawyer approved language about securing the wheels). The other kid's parents will be joined to the lawsuit for improper assembly and supervision. I remember school safety lessons telling us never to ride with another kid on the bike. The extra weight combined with the lack of strength (to control and apply brakes) in the kid driving the bike put the situation beyond the kid's capabilities.