A tuned Nissan GT-R had a very serious crash during a Knysna Hill Climb and a video was captured thanks to a spectator recording the event. The car clearly comes in way too hot to the corner, understeers, slides off the road before hitting an object which flips the car into the air. I am not sure as to the extent of injuries (if any) but I would bet the GT-R will go straight to a scrap yard.
