There must be some unwritten rule that if you're going to face off against a prehistoric predator, you'd better make sure there's some heavy machinery nearby to even the odds [from an episode of Primeval];
The first time such a confrontation between "monster" and machine on film (that I know of, anyway) was in the film Dinosaurus!;
More recently the low-budget gore-fest Carnosaur pulled the same trick;
Of course, nothing says cheesy b-movie like recycling action sequences; Carnosaur 2 rehashed the climax of the first film using a forklift (Beware: Clip contains gratuitous gore near the onset);
They all pale in comparison to the famous fight between Ripley and the Queen "xenomorph" in the film ALIENS, though, a sequence that still looks as good today as when I first saw it (if you haven't seen it, beware the flying android viscera).
When I was musing about baleen and pharyngeal slits I came across the moray eel, which has a second set of jaws which sit back in its throat until it's time to grab food, then it's just like the beast in Alien.
Primeval is so awesome! I mean its absolute rubbish but I'm utterly addicted to it. You haven't seen tv til you've seen a gorgonopsid trying to trash a kaiser chiefs playing stereo.