Dangerous and Sexy doesn't usually come in the form of a card trick. This one has it all.

Any card can be selected and can be signed by everyone in the room.

The cards are fairly shuffled. A stiletto switch blade is produced. Asking them to concentrate on their card you STAB the knife into the deck. The knife sinks into the deck impaling a stack of cards.

The knife is lifted with the stabbed card pack to reveal that the knife cut EXACTLY to the selected card.