Visual magic at its best!

 

The magician introduces a drinking glass which has been sealed with a piece of rubber. Sitting on top of the rubber is a coin (any coin may be used). The magician now begins to rub the coin with his finger and the coin visibly !!<YES VISIBLY>!! begin to melt through the rubber. Glass, rubber and coin are now left for examination. No duplicate coins, No switches, No sleight of hand - just visual magic at its best!