Indestructibles investigates astonishing near-death experiences including a nearly five kilometre freefall, a helicopter crash and an SUV that topples a pedestrian. When you see the footage, it is hard to believe anyone survived. But they did, and some would call it a miracle. But behind each of these Internet sensations is an unexpected scientific explanation. Now, National Geographic Channel explores these mind-blowing, catastrophic events that seemingly should have ended in death but left survivors wondering how they could possibly still be alive.