Mine is a pretty common story, but with a twist.
I was loading a sled onto a tilt-deck trailer. I didn't have my normal gloves and was wearing my snowboarding mitts instead... not ideal, but doable. Well i get about as far up on the trailer as i need to be and i grab the brake. Of course, with my big, clumsy mitts, i also got a pretty good dose of left-hand-throttle.
Now this actually all ocurred during the summertime, i was shooting a commercial for my trailer business, and i was using a borrowed sled from the polaris dealership, and a borrowed brand new truck from the GM dealership. And, since it was for a commercial it was of course being filmed and there were several people around!
So sure enough, the sled lunges off the front of the trailer. Somehow I jumped over the the side and kept the borrowed sled from flipping upside down onto the bare asphalt, but not before the ski dented the tailgate on the new truck.
Fortunately the dent doctor was able to fix the tailgate for a minimal charge (I thought i was gonna have to buy a new one) and there was no other damage.
Yeah, i was a little nervous on the reshoot! But i ditched the mitts and everything was fine. And yes, the TV guys sent me video later.
If you've got video you need to post it.