The length of Will Kane's/Tom Bird's hair varies because of the long fragmented nature of the shoot, and the fact that the crew did not include any designated continuity personnel.
In the wide frontal tracking shot of the thugs chasing Will and Ricky, all of them are in motion. However, when Will turns to shoot them they have both instantly stopped running.
Throughout the film there are several moments where the dialogue goes out of synch with actors' lips. This is due to the fact that the camera's motor was so loud that the entire film had to be ADRed (or "dubbed").
There is a pyrotechnical grip crouching down, wearing a white shirt in the bottom left corner of the slow-mo shot of Willie C's Sikh thug getting shot in the chest by Will, you will notice
The cameraman's shadow can be seen moving with the action when Willie C's gunsel grabs Will Kane off of the streets, and throws him into the blue Ford Orion.