Continuity: When Sandy hands the $50 bill to the undercover cop, we see its back from her point of view. When the view shifts to the other direction, we still see the back, but we should see the face.
Factual errors: Matt's swimming time at the start of the movie is 44.3 for a 100 meter long course swim. This time would better the world record of 47.84. If he had been swimming in a short course yard (instead of long course meters) pool this time would have been a great time, but not a world record.