Plot hole: Vanilla Ice jumps over the fence causing the horse Kat is riding to buck her off to the ground. How does he make his motorcycle jump over a fence when he is riding on a road? I don't think it's possible unless there was a ramp on the side of the road, and I didn't see one.
Plot hole: Norman, the orphaned new-born calf, could not have survived more than a few days after birth unless he was adopted by a foster-mother cow. The cattle were not dairy cows, and it's obvious the "cowboys" are not providing milk or other sustenance for Norman. Even if he had lived, he would be extremely weak and emaciated and physically unable to run with the herd.
Suggested correction: We see that they are providing said food for Norman, and secondly, we never see if another cow does indeed do exactly that. After all, they can give milk, just not enough to sell, so Norman could indeed get fed.
Plot hole: How was Dolph able to start the car outside Yoshida's house after rescuing Tia? He didn't have a set of keys to that car, and he didn't hotwire it, so how did he get it started so fast, or at all for that matter?
Plot hole: When the police chief asks Joe 'where's the briefcase they were telling me about?' Joe tells him to look in the back seat of the white BMW. There are a couple of problems with this. First, the police chief is looking for a case with a bomb in it, because he received a phone call from the guy who had his BMW stolen. Even if he knew about the money, which is unlikely, the police chief has no way of knowing that the case he is about to open is not a bomb, since no-one saw Marcone steal the case with the bomb in it. Yet he opens it without calling the bomb squad. Second, Joe saw Jimmy put the case with the bomb in the back seat, so why doesn't he warn the police chief about it? (01:35:00)
Plot hole: Splinter knew all along the name of the company who made the Ooze, and literally sat on this vital piece of information for over a decade just because he was too stupid to simply look the name of the company up, written on giant letters and far from being hidden - he merely had to open the yellow pages, no doubt. Nobody with such a telling piece of evidence about their own origins (the canister that mutated them is in his hands and has the logo of the company with the name spelled out) would be unable to find out something this obvious. (00:22:00)
Plot hole: When Dr. Marvin is trying to get Bob to leave the night before his television interview, he can't leave because it's pouring rain. He also can't drive him because their car was left at the boat dock. However, Dr. Marvin could have easily called for a cab to drive Bob back to where he's staying.
Suggested correction: This assumes that there is a taxi service in the small town in which they reside.
This is obviously a tourist town, which would likely create the need for a taxi service.
It also seems to be a fairly secluded and very rich tourist town with cars almost necessary to get around.
Suggested correction: At that time of night in that condition, I highly doubt calling a taxi cab would be easy, especially since Bob lives right down the road, no taxi far away would come just to drive someone a short distance like that.