My worst injury was when I hit a giant oak tree on my mountain bike a few years ago. To say the least, the tree didn't budge and bounced off of it like a ping pong ball.
When I finally stopped rolling down the hill I noticed that the majority of the skin on the inside of my right elbow was all scraped away and there were a few holes in my arm from some twigs sticking out of the tree.
I was on such a big andrenaline rush that I didn't notice my knee was also busted open until I got into a friends car and rubbed blood all over his front dash.
I was told to goto the hospital but never did because I didn't feel like waiting 5 hours just for them to look at it..
It was pretty gross looking and even got me sent home from work the next day because I couldn't cover it up. [:D]
Bike is fine though!!