[Xav]

Lol I'm sorry but I think I know what I'm talking about. I know someone who was sent a harmless media file by email. He opened it, and a few days later he got another email saying the hacker had access to his files!

The 'harmless' file was actually an application, but it's possible to trick the OS into believing it's a different file type. See? I think I know what I'm talking about.