Revealing mistake: When Michael Douglas attempts to swing on a vine over a deep abyss, the (fake) rock that he runs into on the other side gives like a marshmallow.
Continuity mistake: When Ralph drives off with Zolo in the car and turns around in the road, the bus passengers are shown further up the road. However, once the car is in forward motion, they are not seen again.
Continuity mistake: As Jack presents Joan with the necklace when they are seated at dinner during the festival scene, the one he is holding in his hand is a beaded necklace, to attract more light for the further camera shot, only when the close up of the table occurs it is a completely different necklace.
Continuity mistake: When Joan takes over cutting the leaves in the jungle, she drops the machete when she comes upon the skeleton. Neither she nor Jack bend over to pick it up, but Jack has it in the plane to kill the snake.