Ever since I was a kid I've been use to falling or crashing. I've even had several motorcycle crashes on the canyons and race track, granted I was wearing a full suit but I just go back and do it again without much thought. I think for some people it's easy but for others they get traumatized and have a hard time getting over it. As somebody mentioned, you either get over it or you don't. What I realized with dangerous sports is that many people who do them don't realize that at some point in time they WILL get hurt doing it. You have those who get hurt and keep doing it, and you have those who get hurt and quit. Know that this is not the last time you will go down. Either accept that fact and get back on the bike or get rid of that death trap and play some computer games instead. You won't ever get hurt if you stay in your room.