I remember packing jpegs with sub7 payloads and sending to my friends on AIM. The opening and closing on the CD tray is such a classic prank. Best part was that given I was usually the guy my friends and their parents called to fix their computer trouble, I was getting IMs from all of them saying “my cd tray keeps opening and closing”. The reveal of the prank was great except for when I must have done it for like 3 hours while my friend’s mom was using the family computer. She wasn’t very happy with me.