Driver Diumar Bueno noticed during a practice session that his racing truck had completely lost it's brakes midway through the main straight, at which point he was traveling at nearly 190 Km/H. He attempted to drive it into the grass in order to lose momentum, but was ultimately unable to, hitting the tire barrier at an estimated speed of over 160 Km/H. His truck then plummeted down a ditch nearly 3 stories high, and finally came to a rest some 40 meters down the track, near an access route to the track facilities. He fractured both his legs and his right arm as well, but made a full recovery.
Edit: It's also a bit ironic that the billboard he hit (Frum) was the series brake supplier....