Watch The Indestructibles

When Robert Bennett helped feed the lions because of a staff shortage at the Wellington Zoo that day, he never imagined the routine feeding ritual would go horribly wrong. Two young male lions leapt onto him from behind, dragging Robert down and hooking their teeth into his neck as visitors helplessly scream and film from the other side of the fence. Despite the injuries, Robert survived with no major damage. Alex Larenty, an experienced lion trainer re-enacts the scenario using dummies to better understand what actually triggered the attack and if there are any chances and ways out of the lions' claws.

For professional downhill speed biker Eric Barone, tumbling off a bicycle at a speed of 108 mph is the worst case scenario. And, on Volcano Cerro Negro in Nicaragua, after Eric set a new world record, it came true. When watching the crash, it seems almost impossible that anybody could survive such an accident. But Eric Barone did. Why did Eric's bike break in two and how did he survive the impact? Speed biker Markus Stoeckl joins in experiments to uncover answers and to prepare to break Eric Barone's record - without the crash.

Rod Baird is a passionate kayaker. Strong currents are nothing new to him - the more challenging, the better. Chattooga River in North Carolina with its notorious rapids seems to be just perfect. On July 20th in 2003 Rod and his friends chose Chattooga for their kayak tour. They manage the biggest part of the rapids perfectly. Rod has just passed Decapitation Rock, when all of a sudden a strong current flips him over and flushes him head first towards Hydroelectric Rock. Rods kayak is caught in a chute. He is trapped - and still underwater. After several life threatening rescue attempts, Rod can finally be freed and his motionless body is being pulled onto land. At that time, Rod has been underwater for 7 minutes - too long for a human body to survive.

On a holiday trip, while taking pictures of the impressive waves on the North Shore of Hawaii, a huge wave breaks over a couple's heads, dragging Hugh Alexander over a cliff and 20 feet into the wild surf below. Thinking he found a safe place to wait, Hugh swam into the Moi Hole. With pounding waves flowing in, the Moi Hole, made of volcanic rocks and sharp as knives, becomes deadly and hardly anyone has ever come out alive. As lifeguards fight against the roiling ocean to rescue Hugh, their jet ski fills with water and Hugh is left alone with his last bit of strength fading. How does Hugh survive the seemingly unsurvivable?

There are days that one shouldn't set a step out onto the street. Anything can happen and change your life in the blink of an eye. When Andrew Leitch and his parents were out on a stroll with his baby boy, 4-month old Hayden, a car suddenly drove directly towards the family, giving the Leitchs no time to react. Surveillance cameras recorded what happened on the suburban streets as the family fell directly into the path of a roaring rampage.

A first-time skydiving adventure went horribly wrong when Scott Lutz's main parachute separated and flew off. Although he managed to open his rescue parachute, he then crashed into a high-voltage power line. Miraculously, Scott escaped with only minor injuries. What caused Scott to steer his parachute straight into a high-voltage line and how in the world did he survive a 12 thousand-volt shock? An electric safety expert and a behavioral psychologist perform spectacular experiments that get to the heart of this shocking mystery.

In Dayton, Ohio, teenager Breenan Eden's car went airborne after hitting a guardrail and was sent flying across the highway. Miraculously, he completely recovered, but Eden has no memory of the accident and no idea of how he survived. Why did Eden's car go airborne and how did he survive a spectacular crash that, by all accounts, should have killed him? With the help of a stunt team and some mind-blowing experiments, crash investigator Tim Leggett aims to find the reasons for this unlikely survival.

With almost 8,000 jumps under his belt, Michael Holmes, a skydiving instructor, planned to jump from 15,000 ft. in the air- a flight that would change his life forever. Friends watched in horror as both his main and reserve parachutes failed and he plummeted to earth. Witnesses were sure he was dead, but he was found in the bushes- alive, with his helmet camera still rolling. How was this possible?

When a violent collision sent an SUV flying toward pedestrian Scott Tegtmeyer, crushing him to the ground, witnesses were convinced that the devastating impact took his life. The entire terrifying scene, captured by a traffic camera leaves little doubt that survival would be against all odds. With a team of crash experts, National Geographic investigates the most jaw dropping crash survivals caught on tape from around the world and recreates the lethal scenarios in full scale crash tests to determine how Scott Tegtmeyer survived.

It is a typical day for most New York City reporters covering the news from the sky. But for reporter Andrew Torres and veteran helicopter pilot Russ Mowry, their worst fears are realized 800 ft. above the city. Their chopper spins out of control and nosedives, crashing onto a Brooklyn rooftop with the tail of the helicopter snapping off- all filmed by another news copter hovering right above the crash site. Minutes later, witnesses watch in awe as both passengers emerge from the wreckage.