Manhole covers exploding spontaneously into the air like loose cannons? Humans attempting to mimic Spiderman and run up walls? Sound waves shredding phone books? `What Happened Next?' explores the scientific explanations and theories behind unbelievable, scary, funny and jaw-dropping footage of mayhem, destruction, action and stunts caught on camera. The 10-part interactive series features several clips that get paused right before their big, dramatic moments. Viewers then get to pick which of the incredible - but scientifically possible - options presented they think is correct?