Invisible Paper Bag Coin

Effect:

The magician shows an empty paper bag, he mimes throwing a coin up in the air, and catching it with the bag, but as he does, a large thud id heard and there is a coin in the bag!

Set-up:

{none}

Method:

Have the coin in the hand you are going to hold the paper bag in. Show the bag empty, and then do the miming when you want to have the coin "FALL" into the bag, click your fingers and it should quite loudly hit the bottom of the bag!
Tip: As you drop the coin lift the bag up and it will emphasis the noise.