http://www.youtube.com/watch?v=wFX8qt56nN4 Can be used to vanish or produce a coin, or both. Pure sleight, no gimmicks, totally impromptu, can be done naked. Not easy at all, but is definitely achievable. Major downfall are the angles, I reckon it might just be possible to just get two people with it, have done it successfully live though, needs to be done straight on. Has it been done before? What do you think?