The System is a Channel 4 special in which Derren Brown reveals a scam which can convince anyone that he has created a 100 percent guaranteed method for winning on the horses.
Cameras followed a member of the public, Khadisha, as Brown anonymously sent her correct predictions of five races in a row, before encouraging her to place as much money as she could on the sixth race.
After Brown had placed a bet of £4,000 of Khadisha’s money on a horse in the final race, he explained that The System did not really exist.
In this highly personal talk from TEDMED, magician and stuntman David Blaine describes what it took to hold his breath underwater for 17 minutes — a world record (only two minutes shorter than this entire talk!) — and what his often death-defying work means to him.