Audio problem: When Hutch re-enters the bus, Teddy tries to pull a gun on him. Hutch snatches up a bus grip (a pole made of lightweight, plastic-coated aluminum) and bashes Teddy into submission with it. After Teddy goes down, Hutch tosses the aluminum pole to the rubber-lined floor of the bus, but the sound it makes is that of a heavy iron pipe falling on concrete. Bad sound effects.
Continuity mistake: In one scene after Hutch is beaten up on the bus, he has no facial injuries. Then in the next scene, they are back.