When Matt and Simon sit and talk on the beach, there is hair on Simon's forehead in close-ups, but not in longer shots.
When Matt rescues Simon, the strap of his floater is on his left shoulder when he's above the water, but on his right when under water.
When Hobie and Carter first spot Simon being carried out of the water, Hobie's hand suddenly appears on Carter's shoulder in a close-up.
When Caroline and Stephanie rescue the little girl, the girl can be seen waving her hand even though she's supposed to be unconscious.