This is what instant download magic should be about. It's easy to perform, easy for your audience to
understand, and affordable. Card goes through the bill. Is it magic? Or are your eyes just playing
tricks on you? That's it, and that's just dandy for close up, casual magic.
There is alas
one negative: you have to introduce an entire deck to perform this as taught. This can be justified
if you're already doing card magic, but if you're doing this as a one-off then you'll have to think
of a reason to justify pulling out a whole deck. If you are doing other card effects with the same
deck, you'll want to be skilled enough to load, ditch, and potentially cull that special something.
That's a lot of work compared to say a pen through bill effect, which has justification built into
it (ie use the pen to mark the bill).