Other mistake: At the start of the film where Detective Dooley and Jerry-Lee are getting ready for work, we see Dooley climbing out of the shower, but in the reflection in the mirror behind him, we see him emerging and can clearly see his under-pants which are bone-dry. (00:00:32)
Revealing mistake: When Dooley talks about his car to his boss, there is a woman in the ambulance behind him writing on some paper. If you look closely you can see that she is just moving her hand and not actually writing. (00:10:25)
Visible crew/equipment: When Dooley pulls up to the station after realising he was being set up, there is a massive light reflected in the green paint. This cannot be the sun due to the shadow of the car going in completely the wrong direction. (00:20:10)
Continuity mistake: When the bad guy is taking photos of Dooley and his partner, there is one where the ticket is still in the window even though Dooley has taken the ticket off the window. (00:29:00)
Visible crew/equipment: When Phil gets the Bazooka out of the trailer, look carefully and you can two head shadows in the trailer. One for Phil and one for the cameraman. (00:48:40)
Visible crew/equipment: When Phil fires the Bazooka at Dooley's car, if you look closely you can see a wire guiding the rocket. (00:48:45)
Deliberate mistake: When Dooley looks at the photo of himself, Jerry Lee and his wife Tracey, it's obviously a still shot from the first movie, as the angle the picture is taken from was obviously not taken by anyone else as they were the only two in the apartment with Jerry Lee at the time. (01:11:40)
Revealing mistake: During the shootout at the police station, there is one shot where it shows a pc being shot. If you look closely you can see that a bit of paper with an image has been taped to the monitor to make it look as if it was on. (01:14:40)
Continuity mistake: Near the end at the police station, Devon Lang walks straight into the grounds of the station (which he would never be allowed to do) then he just knocks on a fire door and someone answers. Wouldn't the cop find it a bit odd that someone is knocking on the fire door, and then the cop actually opens the door not seeming to be suspicious at all.
Revealing mistake: At the end when it shows Dooley and Jerry-Lee filming the exercise video, Dooley has a plaster on his head in the exact place he had one when it showed Dooley trying to get Jerry-Lee to jump off the roof.