The worst thing like this is a report I read that happend in Houston (I think), where a guy went to get checked out in a plane at an FBO, and during the flight asked the CFI to take over so he could try out his new camera. There were pretty high since this guy wanted to try out his camera (7 or 8 thousand I believe). Well the CFI put the airplane into a steep left bank at the request of the pilot/photographer, and while the CFI wasn't looking the guy unbuckled himself and jumped out. He had left a note back at home so they know it was a suicide.
I don't think I'd be in much condition to land after something like that happens. Why did he have to involve the CFI in something like that? He didn't destroy the plane but its almost worse I think, because that CFI is probably scarred for life now.