While cleaning out a closet, I stumbled upon a strange little objectโbent wire, a rubber band, and a small metal washer tied together with no obvious purpose. At first, it looked like a broken clip or some improvised tool. Then the memory clicked. This was one of those old envelope surprises, a harmless prank designed to startle someone the moment they open a letter. Understanding what it is starts with recognizing how everyday items were once turned into simple moments of surprise.To understand how this prank works, imagine a tiny spring hidden inside an envelope. The device is compressed and held in place by the paper itself. When the envelope is opened, the tension is released instantly. The wire snaps outward, the washer adds weight and motion, and the sudden movement creates the entire effect. The goal isnโt complexityโitโs timing. The surprise happens so fast that itโs over before the brain has time to react.
