Manhole covers exploding spontaneously into the air like loose cannons? Humans attempting to mimic Spiderman and run up walls? Sound waves shredding phone books?
　　Discovery Channel explores the scientific explanations and theories behind some of the most unbelievable, scary, funny and jaw-dropping footage of mayhem, destruction, action and stunts ever caught on camera. This interactive 10-part series features several clips that get paused right before their big, dramatic moments. Which of the incredible - but scientifically possible - options presented, is correct?
　　With astounding footage, amazing science, ambitious stunts and clever questions, WHAT HAPPENED NEXT? delivers a non-stop succession of facts, each more brilliant than the last!