This effect is in a class of its own. It's, in my opinion, as close as you can get to real magic. It
requires a 30 second set-up, or you can just have a seperate deck of cards for that one trick. Not
only is the card examinable, the whole deck can be also depending on the type of set-up you use. One
basic card sleight is required (at least in the version I use). No one I showed this to has ever
figured this trick out, and I doubt anyone ever will.