Here's a couple of those for you...

Pedaling along on limestone bike trail and realize its getting realy warm. So instead of stopping to remove jacket I do it on the bike.....HEY! how did I get down here on the ground and why is there a big tear in my shorts .... dupid!

One of my favorites... Frisbee with friends years ago. I was running over this slope after the frisbee and running fast and watching the frisbee. My friends all said they saw me go over this little slope and after I disappeared they saw this little tree shake a lot. I hit that tree and next I know I am staring at the sky. Glad I was stoned that day

I can think of a few others ... I think these were enough. Can't help but laugh at yourself sometimes.