You show a red ball to your audience. You place it in your hand with a bit of a tricky gesture. Acknowledging that your spectator may suspect you of trickery, you ask them what hand they think the ball is in.
Regardless of which hand they choose, they are ALWAYS wrong. Because it is revealed that one hand holds a BLACK sponge ball and the other hand now holds a large red sponge SQUARE!
There is nothing else in your hands... and the red ball is found in your POCKET!
This is an outstanding, baffling trick that is really easy to do. You'll want to carry it with you all the time!