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).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.