I was riding my hog one nice memorial weekend with my other riding buddies. We were riding the Devil's Backbone, a very curvey FM road in the hill country. Everything was fine till I took one of the curves a little to fast, drifted a bit to far to edge of the road, got into some gravel and the bike started to get away from me. So I was in the bar ditch and headed for a huge boulder that had a powerline guide wire right behind it and behind that was a barbed wire fence. I thought, ok I'll just stick my leg out when I get to it and push off of it, like you would do in motorcross.
It didn't work out so great. It snapped both my tibia and fibia. Mind you that at the same time I'm down gearing and braking. When it snapped, I gripped the front brake handle a bit too much...sent me flying over the handle bars and 4 somersaults and about 20 feet skidding on my belly later, I came to a sudden stop in the middle of a huge dust cloud.
I tried to stand up but fell immediately...I didn't realize my leg had been broken, there was no pain at all...until I picked up my leg and it slipped about 6" out the bottom of my pants leg.

that kinda freaked me out a little.
Took the ambulance 55 minutes to get there, it's a pretty remote area. All my riding buddies were amazed at how I just calmly laid in the ditch, not making a sound. They were like, scream or holler or do something...they couldn't believe I wasn't in pain...and I wasn't. Funny thing is this broken femur hurts 100 times as much as that break did, it never did really hurt bad.