Continuity mistake: When Porter goes to see Carter in his office to get his money, porter throws a roll of coins at Carter that he used to punch out the two body guards. Carter takes the roll and rolls it on his desk towards Porter. The very next couple scenes, the roll of coins is missing from the desk. (01:06:20)
Continuity mistake: When Porter, Val and Lynn make the 'hit' on the Chows in the beginning of the movie, their car changes from a 1970 Nova to a 1973 Nova. It is apparent by the differences in the grill: There are square, orange parking lights in the grill on a '73 and there are no parking lights in the grill of a '70.