I'm enjoying these iPhone apps that make mischief, like the Ghost Cam? Gullible or not, I know I would be trembling where I stand if someone pulled this on me.
From the app, you just take a picture of your victim (or anything to show your victim), and the Ghost Cam (for 99 cents) adds spooky, transparent-ish ghost images to your picture. This is way worse than that part in the Haunted House ride at Disneyland where it looks like ghost is in your car — this is truly chilling. There's even setting to what kind of/how ghostly you want your effects. I have goosebumps.