Audio problem: When Axel is first arrested you hear Axel talking to the police officers as they pull up to the station and you hear the police officer talking back to him as he gets out of the car but none of their lips are moving.
Audio problem: Taggart and Rosewood try to pursue Foley from the hotel but their car stalls from the "banana in the tailpipe", and when Rosewood tries to restart it, it makes the starting sound of an older Chrysler, when the car is actually a Mercury.
Audio problem: Zack walks up to Axel after Maitland and his men show up at the warehouse where Axel and Jenny find the cocaine in the coffee crate, and says "I should've taken care of you in Detroit, when I popped your little buddy." When he says "buddy", it's an over-the-shoulder shot of Zack from behind. His mouth doesn't move.
Audio problem: In the bonding warehouse, there is no sound from Jenny's shoes when she is running, but when outside, you can hear her footsteps.
Answer: Axel gets knocked out by one of the thugs as soon as he opens the door. His boss later make mention of the fact that he's lucky he didn't get killed too. They probably spared him because he didn't see who hit him and therefore could not tell anyone what they looked like.
XIII