So, let me get this straight. Your Amiga fell two stories, landed on concrete, destroyed the case, destroyed the floppy drive, cracked the motherboard, and damaged chip sockets.... And you REPAIRED IT? damn, that's dedication.
I never did anything too stupid to an Amiga.
I destroyed some data once by being in a hurry. I was swapping SCSI drives around, and didn't realize I hadn't properly terminated the chain. The backup I had made was corrupt. I didn't realize the termination error or test my backup before reformatting the master, though. d'oh!
I blew a CIA chip on my old A500 by hot swapping a parallel port digitizer. Simple enough to fix, though. Ended up costing me like $10 for a new CIA. As lessons go, it was a cheap one.
That's about it, really. I've been pretty fortunate through the years.