Hollow is such an amazing trick that can be done with any signed card. No force is needed when
having a card selected but unfortunately the trick can't be done face up. If you own the trick you
know why. But that doesn't mean that it isn't still stunning. Witnessing a hole move in a solid card
is so amazing but to witness move from one card to another is even more amazing. The best part is
that afterwards, you can even let them keep their signed card as a souvenir.