Notice how in both of the videos posted in this thread, they both fell at exactly 0 second. This is just to build the tension of the viewer. They can get off that thing without even removing the jacket and they know how to do it. They won't risk their life that ridiculously. It's all for entertainment.
Intense, but definitely fake. Do you really think that ITV were going to take the risk of a man dying live on their family entertainment television show in front of millions of viewers?