In this car accident video they are in the middle of a pickup truck race when one of the outside trucks nudges the middle truck which nudges the inside truck. The inside truck loses it and goes sliding off towards the inside of the track. The wind catchs the truck and it flies up like a giant wing and comes down on the top of the cab. It bounces the top of the cab off the track throwing sparks everywhere before the truck rights itself again and continues skidding along the pavement. It's pretty amazing how that original tap from the middle truck through the inside truck so off that it completely flipped over like that.