It's not so bad, this guy creamed a $38 Billion dollar one:
http://www.msnbc.msn.com/id/17702021/
JUNEAU, Alaska - Perhaps you know that sinking feeling when a single keystroke accidentally destroys hours of work. Now imagine wiping out a disk drive containing an account worth $38 billion.Thats what happened to a computer technician reformatting a disk drive at the Alaska Department of Revenue. While doing routine maintenance work, the technician accidentally deleted applicant information for an oil-funded account one of Alaska residents biggest perks and mistakenly reformatted the backup drive, as well.
http://www.msnbc.msn.com/id/17702021/