Continuity mistake: In the chase scene the American Mini swerves to miss an oncoming car. That car starts out grey then changes to a another green Mini, then back to the original car that came round the corner.
Continuity mistake: The protagonist just arrived to his college. Long shot as he gets off the taxi, and to the right of the frame you see a group of 3 girls crossing the street and walking on the lawn. Cut, and the 3 girls have yet to cross. (00:07:00)
Continuity mistake: When Joe is first in the cat and him and 22 see each other, the cat has a harness on. In the next shot when they leave the room, the harness is gone. (00:38:20)
Continuity mistake: Maggie was holding two bottles (clear containing a green liquid) in her right hand and set them on the table together with one at an angle behind the other. She moved her hand away and when the camera shifted to a wide view, the bottles were side-by-side (horizontal to the screen) with more space between them. Also, both bottles were almost full, but had less in them when Maggie handed one to Grace at the airport. (Maggie may have had a sip out of hers, but not Grace's; both looked unopened). (00:03:33 - 00:04:25)