Continuity mistake: As the police come to arrest the 21 gang after the shootout, you can see a police car coming down a path behind one of the officers telling the gang to freeze. The police car has its flashing lights on and is coming quickly towards the end of the path. After a few shots, Frog remarks, "What do you want, eh?" The shot returns to the police officer and the police car is once again coming down the path, but this time doesn't have his lights on. Also, the car should have stopped by then, indicating the car was coming down the path again.