Wow. I didn't think it could happen to me. After all, I'm, not that old and I've been excersizing a lot lately. My prowess is unquestioned and yet, when I was in the moment, it failed!
Of course, I'm talking about morning root. That's when you get up early, log into your Unix console as root and attempt to clean up the disk. Normally, you try to to remove unimportant files. The problem is my addiction to filename tab completion. This feature is there to make your life easier, but combining that with rm and bleary eyes makes for a fatal cocktail of filesystem death! In my case, I was trying to remove an old copy of mysql and instead deleted the current, live copy. Holy fsck, Batman!
In the future, I'll be sure to have a muffin before getting it, that is free diskspace, up.