Suicide Jumper at Improv Everywhere
http://www.improveverywhere.com/2005/12/10/suicide-jumper
"A few weeks ago I ... noticed a four-foot tall ledge protruding from a seemingly abandoned building. The next logical step was to stage an Improv Everywhere Mission with a suicide jumper on the absurdly small ledge."
Improv Everywhere Mission: The Mp3 Experiment 2.0
http://www.improveverywhere.com/mission_view.php?mission_id=52
"They're all these people here throwing beach balls everywhere. I need backup. Wait... it looks like they're cleaning up after themselves. Nevermind."