THE LEVITATING KNIFE TRICK

Set this up by picking up a table knife and telling your audience that you are going to make it vanish and reappear somewhere
else. Total lie, but it will distract them somewhat. Then, when the knife doesn't disappear, you act completely
stunned that it is actually levitating in your hand. Or you can play it up that your hand is magnetic.
Whatever, it's a cute trick and will often fool some of the most intelligent people.
Lay a table knife across the palm of your hand, grasp the underside of your wrist with the other hand as shown. Your index
finger is secretly supporting the knife, but seen from the rear, it looks as if the knife is levitating against your hand.
You also can do this with a pencil. Do NOT use a sharp knife for this trick!