Revealing mistake: During crash scenes towards the end the local traffic in the background is driving on the left hand side of the road (filmed at Darling Point, Wynnum, Australia) even though the movie is set in the USA.
Revealing mistake: Whenever normal Jess fights with sackhead Jess it's obvious that it's a man. Take note of the different and larger hands in particular.
Visible crew/equipment: At the beginning of the film, the first time we see the yacht, there is a panning shot from the water going up above the prow of the ship. When this happens you can see the camera operator reflected on the metal surface. (00:04:26)