You people have got to be joking, 10 mph is *plenty* fast to crack your head open! Heck, people have gotten concussions hitting an open dresser drawer...and that just while standing up!! I'm not suggesting that you gear up to get your socks each morning, but I *am* suggesting that you helmet-up when you are talking about speeds 10 or 20 times greater.
And also note that "even" a 10mph crash will probably result (because of the nature of rotational motion added to the fact that you're a good 4-5 feet off of the ground) in your head hitting the ground at a significantly higher speed than 10mph.
Keep your noggin safe--especially as a lot of us humans get great pleasure in telling you that we "told you so"--and there certainly would be none of that if you go and spew out your brains first!
