Grade up the magic by the power of the material
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EFFECT: As the performer begins to tell the audience about a strange phenomena called Double Vision, he brings out a bottle and nothing else. ""First you need something to look at."" As this is said the performer reaches into thin air and produces a shot glass! He sets the bottle down and displays the glass. Suddenly he splits this glass into two shot glasses! He then fills the two glasses and drinks up one, explaining that it is said by some that a drink can cause Double Vision. He then stacks the full glass into the empty glass wondering if now the audience will see four glasses. He displays the glasses and magically the full glass has vanished and he is left with only the one empty glass! This is a great comedy routine and can even have an anti-drinking theme. You produce a glass from thin air, split the glass into two and vanish a glass full of liquid.