Other mistake: Their big 4x4 at the end is really a two wheel drive. When they make the big jump with the fire all around them you can see the front end in the light. There is no front differential, just two big A frames.
Other mistake: When Cash runs for the wire when escaping the prison in the long shots the stunt man's hair isn't plastered down with the rain and also where was Kurt Russell is wearing a muscle vest his stuntman is wearing a t shirt with sleeves.
When Stallone stops the bad guys in the semi full of cocaine, they fly through a windshield that is apparently made of plate glass, and not the safety glass found on almost every other vehicle windshield on earth.