When the girl falls off of the dinghy and into the water, she gets completely submerged. But when she gets back onto the dinghy, her hair and clothes are completely dry. These wet/dry discontinuities occur all through the movie.
After the two men get out of their helicopter they push a dinghy out into the water. By doing this they get themselves up to their thighs in water, making their trousers wet. But in the next shot of them turning the engine on their trousers are dry.
When one man shoots up out of the water in the jaws of the crocodile, his left arm is dangling by a thread of skin, whilst the other one is waving in the air. But in some of the shots, they flipped the frame, and so in some shots his right arm is dangling by a thread of skin and his left arm is perfectly normal.