Effect:
Hold a coin on your outstretched left-hand palm. Snap your right fingers over the coin and it instantly and completely disappears from BOTH hands.

Secret:
The secret is you hit the coin up your right sleeve with your right-hand fingers when you snap. Just have your shirt cuff up close to your palm a tiny bit and make sure it isn't tight around your wrist or the coin will bounce of the edge of the shirt. A loose sweatshirt is best.

Also after it vanishes bring both hands up allowing the coin to slide down your sleeve. Show both hands clearly empty.

Later, just lean your arm towards the floor to bring it back out when no one is looking.

Someone asked where to place the coin on the palm it just depends how good you can flick it. I place it in the very middle but if you need to place it closer to practice, that's fine.

NOTE FROM TIM DAVID: Another user posted a video of this trick on YouTube. Here is the video:

And now a link (in case the video didn't load)... http://www.youtube.com/watch?v=TOdGFGXjAWA