Continuity mistake: In the scene where Stallone is chasing and shooting at the killer in the factory, he bursts through a door and shoots the hanging body of the FBI/SWAT officer. In the first shot of the officer you can see his lips. The next shot of the body shows that his mouth is duct taped.
Other mistake: In the scene where Stallone's partner is driving him to the detox center, you first see the truck with tyre chains on only the rear wheels. Half a minute down the road they are on all four tyres.