I while back some friends and I were hanging out at a playground, I was drunk and my friend had a broken foot.

For the intrest of shenanigans they gave me the crutches, I set them to the highest setting (he's about 6'4, I set them up to fit somebody thats about 6'8. and I was only 5'8 at the time) and went ontop of a pic-nic table and tried to launch myself off by running and using the crutches to fling me. It was also raining at the time so the table was wet and slippery. When I put the crutches down and was in about mid flight, they slipped, and I landed right on my tailbone on the edge of the table.

I think that accident made me shorter.