Bmore I remember you asked for prank ideas a while ago cuz you and your FI like to prank each other. Well FI looves pranking and actually dislikes very much that I despise them lol. Anyway, he's currently laughing his asss off watching a bunch of youtube videos of this couple who go back and forth pranking each other. Maybe you've already heard of them but even I found several of them pretty hilarious. The girl even did one where she made him think she was cheating on him with someone in bed... lol seriously F'ed up, but the video was pretty funny. Here's the link to their videos
http://www.youtube.com/user/PrankvsPrank . Just reminded me of the pranks you were talking about. Happy pranking! lol