Continuity mistake: When it's driving on the road (in several scenes), the bus has a license plate. In the parking lot in the final scene, the license plate has vanished.
Continuity mistake: In the bus scene at the beginning, the little girl with braces (played by a nonspeaking extra) is seen at the front of the bus, on one side of the fight. Then she is seen near the middle of the bus, on the other side of the fight.