Audio problem: When the couple is flying to their vacation destination, they are in a Turbo-Prop aircraft. The sound affect used was from a piston engined aircraft.
Continuity mistake: During the scene in which the two main characters are diving, before the boat leaves them, Susan's snorkel swaps from the left side of her mask to the right and back again.
Continuity mistake: In one scene where the husband looks under water to see where the sharks are he gets startled and raises up out of the water. As his face comes up he removes his mask. The camera angle changes and in the next shot you see him removing his mask again. (00:50:20)
Other mistake: There are 20 divers counted onto the boat. They all head into the water in 2s, but somehow there is 1 person left without a diving buddy.
Audio problem: When the two submerge they are talking, but they have regulators in their mouths.
Other mistake: The couple are shown travelling on an American Eagle prop plane in the islands, but on-board you see them sitting together with another lady sitting on the left of Susan. The prop planes don't seat 3 together. This shot must have been filmed across the aisle on a larger jet. (00:03:25)
Visible crew/equipment: When Susan says, "Where's the boat?" they are in the shadow of the camera boat.