This slashdot comment reminded me of a story that used to get tossed around at BeOS gatherings:
lcsaudio used to sell BeBoxes (remounted in a custom rackmount case) as part of our show control system. One day the show operators called our tech support to tell us that a 66MHz BeBox was acting a bit sluggish (BeOS, as you may know, is normally quite snappy). On his next visit, our tech took a look inside the case, and found that the fan responsible for cooling one of the two PowerPC 603 CPUs had stopped turning, causing that CPU to overheat and desolder itself from its socket. The BeBox had survived the self-destruction (and self-extraction) of a CPU and continued to run shows for nearly a week without complaint.