In 1996, Bear Grylls' career as an adventurer and television personality was almost pre-empted at the age of 21, when a SAS training exercise went wrong.
During a skydive over Zambia, his parachute failed to inflate at 16,000ft (4,900m).
"I should have cut the main parachute and gone to the reserve but thought there was time to resolve the problem," he later
told the Daily Mail.
Instead, he came to earth on his parachute pack, fracturing three vertebrae in the process.
Although his spinal cord was intact, he spent the next year undergoing 10 hours a day of rehabilitation including physiotherapy, swimming and ultrasound treatment. Some 18 months after the accident, he would reach the summit of Mount Everest.