This is your every nightmare about brake failure realized in one flat out crash. Unbelievably, this driver survived.
You're looking at Diumar Bueno racing in the Brazilian Formula Truck series back in 2012. Autoblog reported that he survived with a mere two broken legs, a broken arm and a cut tongue.
Remind your buddies to check their brakes and their fluid before they hit the track.
(Hat tip to Crazy Leo!)