Feel the pulse:

A great variation, although it's pretty much the same trick, the audience will think it is a different trick entirely. Just don't do these two tricks directly in a row.
Spread the cards face up across the table. Ask your friend to point with his index finger. Grab their wrist as if you are going to feel their pulse increase as their finger slides across their card. Make several passes back and forth across the spread. Slowly slow down the motion and stop on the card that is directly above the "key card." Touch their finger to their card. They will think you can really feel their pulse increase. They will be amazed.