The clever idea behind this trick only applies for making a *live* prediction. In other words, a bit
of information that you could not possibly know before you go on stage. If you're predicting the
super bowl or an election or anything the result of which already took place *before* you go on,
then this method, clever as it is, is pretty useless.
The prediction can only be placed on an
index card in pencil writing. So it'd be impossible for a stage audience to read it without the use
of a camera hooked up to a projector. You'd have to have a volunteer confirm what it says for the
audience, which takes a bit of the impact away. It's a really clever idea for destroying the
evidence behind the method. But I don't see myself using it on a stage.