Ok, a few additional facts for you:
1.) There is a starting discussion about the Show because....Samuel send in a less dangerous bet, and the Show works together with him to make the bet "more attractive" for the people. I don't know, which was his first bet, but the idea about jumping over 5 cars in motion was not from him.
2.) Samuel did not want a helmet! So each of us should rethink about protection.
3.) It's absolutly normal, that such kinds of bet will get a special live enhancement. So if a boy shows, that he can climb a house in 2 minutes....in the show he will get 1:45 or so
4.) The Showmakers said, they did all for perfect circumstances. Light and all other things are made to support him perfectly.
5.) They also said, to decrease nervosity for the live performance, they let him train 2 times with the audiance before.
I talk with a few people who know Samuel personaly, they said me, his timing is absolutly perfect. That's not what i saw in the TV. His high wasn't high enough, he was very nervous. In my analyses, he touched with his head the car and got an additional rotating force. Surprisly he showed no reaction and that's not normal for a guy who started gymnastics with an age of 6. Maybe he got irritated by the head check, I don't know.