Revealing mistake: When Steve distracts Joe Taylor and leaps onto him, the stuntman subbing for the actor playing Taylor is obvious.
Revealing mistake: Torrance Beck and his men load Rockford on the car to dispose of him. They get ambushed, with 2 cars suddenly turning 90° blocking the road. Unexpected? Perhaps, but look at the asphalt; apparently it's a regular thing in that part of the road. There are already skidmarks reproducing the exact same movement. (00:33:30)