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Here is my finale for the ASTC Live Demo Hour 2015. I took a standard science center stunt and turned it into a magic trick. Basically, I used a liquid nitrogen explosion to launch 2500 white ping pong balls into the air. Mixed in were 52 orange ping pong balls, each with the name of a playing card on it. My job was to catch the one ping pong ball printed with the card which was randomly selected by someone from the audience.