These sportsmen have only one enemy: "rise".
This discipline consists in going down from the very steep slopes combining technical and tenacity, to jump of the breaks sometimes reaching the 8 meters in height, it is one of the most sensational practices of the vtt.
The mentality of this practice can be defined in these some words: "CA PASSES OR CA BREAKS".
Obstinate included/understood it to you, to become one stamped of the vtt, one needs genuine machines, "tanks", to resist ardours of Free-riders.
Indeed, the solidity of the material is a key element of this discipline, which can prove extremely dangerous if this one is not practised with serious and rigour!
However, this discipline is with the descent to only get feelings except standards to you. Some claim that this practice concerns the madness, but that is a coarse error.
This practice is certainly dangerous but it is practised by responsible vetetists who can say "not" when the spot proves too dangerous.
The free wrinkle undergoes today a true cure of Youth with new ways of practising it, like the bike-park.