In one scene, Nick Nolte is driving Eddie Murphy around in a convertible. First you see Murphy in handcuffs, then no cuffs, he's got one arm on the back of the seat, and then back with the handcuffs on.
In the hilarious fist-fight scene between Nolte and Murphy, they each punch each other the exact same number of times. The fight begins with Murphy landing more punches on Nolte, but then Nolte catches up by the end of the sequence. However, if you count correctly, you'll notice that Nolte is still one punch behind Murphy. That's why once they are both back sitting in the car, about to drive off, Nolte suddenly lands one last knuckle sandwich squarely on Murphy's jaw - now they are even.