There's a video making the rounds of a girl jumping off the high dive at a pool.  But she chickens out at the last second . . . tries to grab a railing to stop herself . . . and ends up hitting another high dive right below her HARD, then cartwheeling into the water.

 

 

If you want to see someone who DIDN'T chicken out, some guy jumped into a pool from the roof of four-story building.  And luckily it was deep enough, because he survived.

 

 

(Search for "Lava Hotsprings High Dive Accident" and "Crazy Roof Jump Off 5 Story Building."  The title says it's five stories, but they're counting the roof.  He jumps at :20.)