Revealing mistake: Towards the end when Vanilla Ice jumps the motorcycle over Nick's car, you can see the ramp he used through the car's windshield.
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.