Probably not a good idea, but thinking about it was sort of amusing. My brother is always messing around with me, when I'm working with electricity (hate getting shocked) or soldering, so thought of a little payback gag while wrapping some presents. I was using some of that metallic foil wrapping paper, and started thinking I could hide the guts from a disposable flash camera in the box, with a lead coming off the flash tube, connecting to the wrapping paper. A simple switch on the box lid. When he removes the top, flash, zap. I know the capacitor gives a healthy jolt, unfortunately from personal experience. Haven't felt the sting off the high voltage lead, but figure its lower current, maybe a little less dangerous. Figured I ask and see if anyone thinks its too bad an idea, before going ahead. I know we've had dozens of kids using those flash circuits to shock their friends, so couldn't be too bad. Little concerned about retaliation, since he's unemployed, and I'm still punching the clock...