ah memories
I did a lot of PC repair and on top of all that I managed to find a case that was filled with spiders (from Hawaii) and on several occasions had some nasty cuts and other injuries from working with various machines(IBM was a bad case designer all around because on top of the dangers of entering the machine the exterior was also defended with sharp hard corners that would dig in to your flesh if you tried to lift one on to a desk).
The worst thing about old PCs had to be the CPU mounts. They were hard to get on and required you to push down hard on a spring with a screw driver and let me tell you, more then one RMAed MotherBoard had a mysterious slash across it. Oddly though some worked even after a few tiny chips were chopped off so... I never actually told anyone that i'd hit it with a screw with the hope that what I did destroy wasn't all that important....
...
Or about that fire I caused by inserting the USB connector backwards.