Zip Bomb
I found a similar file to this (a zip file that contains itself) and e-mailed it to a friend at work.  He never received it, but I thought nothing of it (I assumed the email filters just destroyed it).<p>A days later the mail server stops working and the sysadmin turns up at my desk.  Turns out the anti-virus scanner had been unzipping and scanning repeatedly.  It eventually filled up the entire disk and bad things happened.