I know this guy who made a virus which formats your harddrive when you open the folder
Cool story, I can do that too.
But it's a MP3
file.
That you can open in an SSTV program.
Seriously.
Edit:
Ooh, I just remembered this guy that made a virus from a .AIM audio file that sent information to his computer. Epic stuff.
Edit:
I'm probably making you not want to download it now, aren't I?