When I perform WOW, people's jaws drop.
I also have an Invisible Deck routine I do with two decks - the second is a Gambler's Deck. It has markings that tell me the bottom card of the stack as well as the top, so I cut the deck a few times, let the spectator to the final cut, then lift the whole pack and show them the card, stating how I can't even see the back of their card, so a marked deck would do me no good. I then use the Invisible to "haunt" the other deck, make the reveal, and they're all baffled.