This magic is so funny. You show the audience a ball, you throw it to the ground, and you tell the audience that the higher the bounce, the higher the intelligence of the person who still throws the ball. You demonstrated and the ball bounced over your head. But when you give the ball to the audience, it doesn't bounce at all after he drops it, and you can check it at will after the performance!! The feeling of sticking straight to the ground!! That's great!!! You can have a close up view of the stage, and it's hilarious and interactive magic! Very interesting props!