Preparation:

1 glass, a matchbook, six coins, and an ashtray with water.

Method:

Make sure ashtray is filled with at the most, a quarter of an inch of water. Stack the coins in the center of the ashtray so that the top two coins are above the water.
Place four unlit matches on top of the coins. Light the matches and immediately cover the flame and coins with the glass. The water will be drawn into the glass. You win !!! collect your bets.