Continuity mistake: The amount of broken glass when Van Damme breaks the jukebox with a guy's head differs between shots.
Revealing mistake: When the prison bus flips over, the cannon on the underside of the chassis to enable it to flip over is visible.
Other mistake: Devereux and Scott are sent after the reporter to apprehend her. Only problem with that is moments before they were sent to go get her, they were naked having their injections, there wasn't enough time for them to have kitted up and gone after her with any hope of catching her.