I love the idea and the gimmick but the inner tube is not even close to the diameter of the outer
tube causing the balls to get stuck. Also, the gimmick has to pushed kind of hard and it's obvious
you are not just dropping the balls in. When the ball gets stuck because it's hitting the inner
tube, you need to shake the outer tube until the ball drops. Definitely not a trick I'd want to
perform for an audience.