Severe separated right shoulder and severe stretched hamstring doing a 1-1/2 off a single jump (hit a hole in the face) thought I was going to land on the wheels so I stayed on the bike, the bike landed on me instead. Separated left shoulder twice. Knocked out once just lost memory. Been riding for 40 years and broke first bone last year (collar bone). I've quite several times, went fishing for 6 years, and talked about riding the whole time, so I'm back riding. Quitting cigarettes is easier then quitting riding! Decided I can ride better now then latter.