Continuity mistake: Near the end of the movie, after the sheriff saves his son and the girl by shooting the croc with the grenade launcher, there is a shot of them walking towards the crazy woman's house. He now has a regular rifle, and he does not have the launcher on him. But when he sets the trap for the next croc, he has the launcher back again.
Factual error: When the sheriff's son and the girl are sitting shivering in the rain, she indicates that she is hungry enough to eat an entire Hometown Buffet. There are no Hometown Buffets in the states of Maine, Vermont, and New Hampshire. They are called Old Country Buffets there.