Coin Through the Hand

Effect:
The Mighty Magician (you again!) demonstrates the amazing ability to push a coin straight through his/her own hand.
After one failed attempt, the magician decides to try again, and this time the coin goes right through the hand.

Setup:
In order to do this trick, you'll simply need a coin. A quarter is prefferable, but any coin can be used really.

Hold out your right hand in a fist, with your palm facing down.
Take the quarter in the left hand, between the thumb and other fingers, and push it against your hand. It should just push back behind your fingers, making it not visible to the audience.
Now, keep your left hand still, and pull roll your right hand over. While you roll it over, open up your fist. There will be no quarter in it.
Look at the audience, and exclaim that the trick didn't work.
As soon as you look up at the audience, roll your right hand back over into a fist, and drop the quarter from your left hand, into your right hand while it's rolling over. When you look up, the audience should look up at you as well. This is the distraction you will use, called misdirection.
It's all cake from here. The quarter is already in your right hand, so pretend to push it through, etc. Emphasize it, and look unsure about what you're doing. Make it seem as though there is a quarter in your left hand. Then, roll your right hand over, and show them the quarter.