I live in a dorm. A 12 story high Dorm. Someone on the 10th floor forgot to close the window during the night. Hard to believe he 'forgot' considering it's 10 Degrees Celsius Below the freezing point outside.
To make a Long story short, a water pipe splited open because of the cold. Flooded 4 floors and spilled wated on the remaining 6 floors...
I was lucky: My computer was powered down. (it lives on the floor) I hate to think what would have happenned had it been on.
Bye Bye power supply and all hard drives with it.