1. i remember when i was like 5, i deleted the system folder off my mums macintosh plus, that was pretty bad heh.
2. ive fried a few power supplies at 220V as well, not so bad, but a pain in the ass to buy and replace.
3. i remember when i had my imac dv (what has made me since wary of slot loading drives) i had bought this weird looking cd: it looked like the blade of a table / skill saw, it was all jagged, looked kinda cool, really.
anyhow, i wanted to rip the choons off of it and slipped it in the drive. the drive proceeded to make that uncomfortable whining sound as it slurped up the cd, but once the cd was in, it kept making that sound.
after a while of pressing "eject", then trying with a paperclip, i very stupidly tried shoving another cd in there, hoping 2x thicker would give it enough traction to spit the whole mess out. it accepted the 2nd cd, and stopped making that sound.
to get the cds out, i had to take the casing apart and with pliers yank out the cds. luckily, neither cd was damaged, nor was the drive!