In the scene where the T-Rex's have damaged the campers/trailers. We see that the guy trying to save them (can't remember his name) has tied the wench around the bumper. When he gets back into the SUV and puts in reverse, it shows a shot of the back wheels spinning and then a wide shot of all of the tires spinning. Right afterwards it shows this character turning the 4-wheel drive on and trying again. How can all the wheels spin if they weren't in 4-wheel drive to begin with?