You ask the spectator to provide you with a coin, which they sign first. You then hold out an empty shot glass, which you half fill with water and then cover with a borrowed handkerchief.

You place the coin under the handkerchief and ask the spectator to hold it through the handkerchief.

You ask them to drop the coin into the shotglass, which they do. It can be heard falling into the glass.

You then take the handkerchief away, the coin has vanished from the glass!

An amazing coin magic trick that will make the audience gasp.