A young man disappears down a huge crack in the ice thousands of feet up a mountain. It's all captured on his friend's helmet camera.

When a family car catches fire at a safari park, there is no way out - the car is inside the lion enclosure.

A cyclist disappears under the wheels of an 18-ton truck, a 16-year-old gets stuck in a drain trying to rescue her mobile phone and a camera in a train cab captures the moment a woman is pulled from the live rail track to safety.