My brother's 1st-gen iPod nano fell out of his pants and got run over by a car when we were crossing a busy street in Toronto. He totally blamed me for it because I was the one who started running across the street instead of waiting at the nearest traffic light. I felt sufficiently bad that I bought him a new aluminum nano when they came out shortly after.
A few months back I was doing a hard drive replacement on my 12" PowerBook. This is not for the faint of heart as you have to disassemble everything to get to the drive. I asked a friend to do it because I didn't have the guts to; we followed one of the disassembly instruction web sites step by step. One step was to disconnect the ribbon cable from the keyboard. "This is really tight," my friend said. "I'm not sure how to... *RIP*!"
I watched in horror as the ribbon conductors ripped clean away from the connector it was crimped to. "Uh, was that supposed to happen?"
Luckily we were able to re-crimp the connector (it's just a friction fit), there was no damage and the keyboard works fine.... whew! Was a tense couple of minutes.