Revealing mistake: In the car chase scene where the cop is after Roland, you can see that there is no key in the ignition of the cop's car.
Revealing mistake: After the girl is shot through the window and Tyler is beating on the sniper, he hits him with the gun. You can see the gun bend and shake, showing that it's rubber or another soft material. Even better when viewed in slow motion, it's very easy to see how much it bends. (00:42:05)
Revealing mistake: When Roland Tyler (Bryan Brown) beats Lipton (Cliff De Young) with his rifle, you can see that both times he hits him, the rifle bends as if being made from rubber. (00:42:16)
Answer: It was most likely a joke, the movie was so horrible it gave Rollie a bad reputation and probably got him blacklisted.