When Paul sees frog walking down his leg, it is not facing him, but in the next shot of it, it is, which is too fast for it to have turned around.
When Paul escapes in the car (using the keys he took from the chauffeur), he starts the engine with the key, even though, in a prior scene, he had yanked out the ignition wires, and is never seen to fix them.
Near the beginning when Paul and Barbara are trying to get to the village in an inflatable raft, Barbara is clearly on the right side and Paul is on the left, mounting his oar. At about 16:38 the scene cuts and they are on opposite sides.
When Paul enters his room it is on the second floor but the room he looks out of later is on the third floor.
In the scene where Paul is the hotel room, he removes the door slide bolt from the dresser and puts it on the door. He only puts one screw on it and its also positioned awkwardly. In the next shoot, there are two screws on the slide bolt with it placed correctly on the door.
In two instances when main character comes in contact with glass, first when he jumps through the window into glass ceiling and second when he breaks a window, he is never cut or scratched by any of it, while in reality it could probably seriously wound him or even kill him in first case.
After Paul hits the man and the car runs off the road, the hubcap comes off the wheel twice... the second time the wire on the cap is clearly visible.
When Paul is trying to escape in the car and hits one of the villagers in the road, the man is yanked back, (by an obvious harness), before the car even touches him.
When Paul lights himself aflame, given that he is covered in flammable liquid, he would burst into flames right away, yet that is shown only in the next shot of him.
When the storm is approaching towards the ship, the sky gets dark quickly, but in other shots the sky is clearly blue and with a bright sun.
When Paul escapes skinning you can see hung and dead Ezequiel breathing in the background.