None of mine can match my friend Jeremy.
We lived up the street from the city beach. During the off season, the city would take the raft out of the water and put it up on blocks in the parking lot.
We all had our bmx type bikes and decided to built a ramp to ride down off the raft. Once we got it set up we were all goofing around and Jeremy decided he wanted to be the first one to ride down the ramp. He got some decent speed up and was too late to react to us yelling to him the ramp was on the other side.