Continuity mistake: The cliffdivers' shorts change from blue to white.
Continuity mistake: When Novak hops in the boat to join the sheriff as she races off to rescue her children, he is wearing shoes/boots. Later, when they are pulling Jake and Kelly out of the water, Novak is barefoot.
Continuity mistake: The length of the rescue rope changes drastically.
Continuity mistake: The little girl steps on glass. Later in the movie when they are climbing across the rope, there's no cut on her foot.