When the group arrives at the beach, Amy has left her bikini top at her last destination and must wear a T-shirt to swim. However, when the group is later trekking through the jungle, she clearly has a bikini top on.
After Kiko busts his head open and is being repaired by getting the wound cleaned and closed with 5 staples at the evil Doctor's house, he lays down for the evening to heal. When he gets up, he is completely composed and acts as though nothing ever happened to his head.
In the first scene at the beach, when Pru is showing her trick to take off her clothes without taking off the bikini, she is wearing a green/brown bikini. Even though they later get robbed of everything but the clothes they are wearing, by the time they get in the house she has changed to a white bikini.
When the tourists are hiking the morning after being robbed, Pru wears white flip-flops for a moment. No one else is wearing shoes.
After Bea stabs the kidnapper with the hiragana tattoo on his right shoulder (the one that hunts with the arrows) we see him sink to the bottom of the cave. However, there is no tattoo on his shoulder anymore.
When Liam is chasing two boys through the town, he is walking along a street when one of the boys steps out from behind a bush and throws a rock at his head. Although the sound of an impact is heard, the rock can be clearly seen sailing just past the back of Liam's head.
When the nurse/assistant injects Finn with a sedative to keep him subdued, the liquid can be seen dripping from the syringe and a huge bubble running up the IV line. The bubble this size would kill Finn very quickly and Zamora would then be harvesting organs from the dead body.
At the end of the movie, a Cessna Caravan pulls up and shuts its engine down. The sound is that of a piston engine and not the Caravans own turbine engine. The same piston engine can be heard as the aircraft takes off in a later scene.
As they are entering the house off the river someone can be seen through the windows moving just to the left of center in the back ground. No responses as they search the house and call out initially.
Kiko never seems to tell Alex his name. Alex never asks Kiko his name because he keeps trying to correct his grammar regarding how many siblings Alex has. Alex merely calls Bea over to meet him. However as Bea walks away Kiko yells his name out to her.
In the scene where the group arrives at the house and Alex is snooping around, Alex attempts to open some locked glass doors from the outside. As he peers in, a brief reflection of a boom mic can be seen just above his head.