Mind Power by Stephen Tucker

A fork and a spoon are shown. Someone chooses one leaving you with the spoon (ho, ho!), which you now bend using 'the power of your mind' alone. Actually you do bend it, but by pressing it against your forehead! However, it now visibly straightens (all by itself!) then slowly bends again, whilst held in one hand only, snaps in two and is handed out for immediate examination!

Self-working...nobody does it for you! It is all in the most simple and ingenious gimmick that costs you a penny if you don't already have the right thing somewhere at home.