My turn.
XL250s, pulled a wheelie at the end of pulling away on a junction but still had some momentum in the bike and ended up on my righthand side in a lump.
Same bike after a morning out off road. Hit the back brake to skid the rear to go into my driveway. Bike does another 90 degs more than I expected and my left leg is stretched as far as it'll go, on the floor in front of many neighbours.
DRZ, wheelie away front the middle of two lanes of traffic on a roundabout only to hit the floor as the front tyre never got to grip the road as it came down. Both lanes of said traffic laughing as they drove passed. My shoulder hurt for months after that one.