Magically alter the drawing on a blackboard!
Show your audience a board containing a hand drawn illustration of a spoon. Ask a spectator to sign the board, proving that no switches will take place. Cover the board and make a magical gesture. When you remove the lid, the illustration now shows a bent spoon!
This unbelievable trick, accomplished by a surprising new principle, has baffled magicians around the world. You can magically alter drawings on the blackboard despite the fact that the board was signed by a spectator - an apparently impossible condition that proves no switches were made. Additional handlings and detailed presentations are included.