People sleep in the forest before trying to retrieve the painting. When they wake up, they are at the beach.
At minute 18:00 when the crooks come out of the water, all of them are perfectly dry.
The second stick of dynamite never explodes.
Rich throws the girls in the water by Rich. They come out with their tops on. They sleep in the forest with their tops off, then wake up with their tops on.
The boat has sunk and Jill is washed up on the beach. She is dry and she is still wearing clip flaps. Then her friends come. Also completely dry.
At minute 56:00, the pistol dropped in the water, floats before the girl can pick it up.
Barb says the girls wasted all their ammo on the shark, even though the girls are never seen or heard shooting.