This is one of the best effects that I have ever seen. If you do not have the mystery box get it. I have it and it literally blows everyone away. I even let the spectator hold the box in their hand so that I cannot even possibly touch it in any way. It depends on your routine as to if there are any funny moves or not. If you have a good routine there are no funny moves or slight of hands. I dont want to go into to much details here, but buy the mystery box and this will be one of your best if not the best effects in your show.