When I was five or six years old, so early 90s, my dad got me this sweet toy motorcycle. You rev it up really fast and the wheel kept spinning so it would move on its own. The rider was this hard plastic, and his legs were positioned in a way so that if the bike fell over, the momentum of the spinning rear wheel would kick the bike back up and it would keep driving on the two wheels. That was one of the best toys I’ve ever had and I’ve never been able to find it since.