At 7:35 he gets almost thrown out of his wheels!
Look at the guys legs - Click the photo for hi-res.
One lower leg is (almost) separated from foot and the other has a strange bend, broken or rubber? Now checkout the video further below, there are some ground shots of the same dude with gruesome separated foot. Why move heavy victims like Nick (Jeff's stuntman) in wheelchairs while others with less serious injuries get gurneys? Why no blood anywhere on street?