I'm enjoying these iPhone apps that make mischief, like the iPolygraph lie detector app. You would have to be pretty gullible to fall for that, but 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.