Edited sentence: 15th August 2009.9 (22).In the Lab, the two teams play Ping Pong Pass where they have to pass ping pong balls from one team member to the next using the flow of air created by hairdryers.Richard examines the effect that moving air particles can have on objects.They battle to win prizes in a furiously messy final game.Two teams compete, using reason and logic to answer questions, perform scientific experiments and predict the outcome of jaw-dropping stunts