Continuity mistake: When Mel is trying to escape from the trunk he brings his feet up and you can see they are seemingly fine even though in the scene before he had his feet smashed in with a large hammer. (01:29:40)
Factual error: Near the end of the movie, when Porter is forcing his way out of the trunk of the car he was trapped in, he forces his way through the backseat and makes a call from the phone in the back of the car to the phone connected to the bomb in the hotel room. The phone he uses in the car is a rotary phone. These phones can not be used in wireless environments. It was an inaccurate prop. (01:30:45)
Continuity mistake: Kris Kristofferson goes to Porter's apartment to find his son. When the phone starts ringing it is right on the edge of the table, right behind the ashtray. However, when the scene gets to where he bends down to answer the phone, the phone is in the middle of the table NEXT to the ashtray. (01:31:10)
Continuity mistake: After the final explosion the camera shows a closeup of the car keys in the ignition, a Ford. Camera shows him driving away in a Cadillac.
Continuity mistake: In the scene in Risie's apartment with Val, Val is holding a gun to Rosie's head. It keeps switching from her head to his knee between shots.
Other mistake: When they crash head on into the gang's car before robbing them, in the brief shot inside showing the impact Mel Gibson's head whips forward as you'd expect, while his passenger's head doesn't.
Other mistake: When Porter cuts the fuel line on the car and is about to light it, Carter's henchmen see him and act surprised. Despite having ample time to get out (as any rational person might do), they just sit in the car and wait for it to explode.
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.
Answer: Quote, "A work man is worthy of his hire." In the original version, the Mob Boss asked, "why are you doing all this?" He replied, "I want my money." It's as simple as that. He did a job and wants his payment.