Terminator 2: Judgment Day
Arnold stands ready for Officer Robert with his Exploding Gun and pistol, but there is no Officer Robert to be seen. Until he jumps out of the shadows and throws the shotgun aside. And then it's time for some hot, robot-on-robot action. They throw each other into various big metal objects and there's a neat scene where Officer Robert is thrown face-first into a wall. And instead of turning around, it's faster for him just to morph his back into his front. Then, when Arnold punches him in his face, he turns his head more liquid than normal to capture the hand and forms a new head over to the side. This is where all that "he's made of liquid metal" stuff is paying off.
Arnold's arm gets caught by a big gear, because there's always big unprotected gears in a Generic Factory Setting. Officer Robert considers him immobilized and moves on.
John and Sarah climb a catwalk to a platform, which seems like it would strand them when Officer Robert comes looking. Arnold uses a handy crowbar-looking thing, possibly a crowbar, to rip off his immobilized arm and get back into the action.
Look! There's Officer Robert coming up to join them on the platform; I told them not to go up there! Sarah sends John down a chain into a big gear-thing, and pulls out a gun that she hopes will help her deal with Officer Robert. If that big hole in his head didn't do it, I think you're in trouble, ma'am. Yup. Having a big spike through your shoulder is "trouble", all right.
"I know this hurts. Call John" menaces Officer Robert as he extends his other hand into a spike and threatens Sarah's eyeballs. She won't do it, and even though she's being very tough, you have to think she's relieved when Arnold shows up and cuts Robert in half with his big crowbar-looking thing.
More robot fighting. Arnold gets pretty well pounded and half his face comes off. He drags himself forward with his one working arm, trying to reach his gun, but he gets spiked to the floor by Officer Robert. The creepy red light in Arnold's eyes goes out.