people who have a habit of closing their Unix session with 'kill -9 -1' - which means "kill all processes you can kill" ...

except there they did not pay attention and the terminal they typed the command into had a "#" not a "$" as the end of the prompt...

result == one Sun E10000 server coming down like a ton of bricks, pulling out RAm, CPU and disk out from under relational databases....

Took about 3 days to recover...