An electrical cable Dallas used to electrocute Officer Manly and himself changes position between shots after Dallas rips it from the circuit panel. It alternates between being attached to the railing and laying on the floor, completely detached from the railing.
When Leone (Stallone) is getting forcefully taken to Gateway Prison, he is shown getting cuffed while just wearing a sleeveless t-shirt. However, when is getting taken outside to be transported, he is wearing another (prison?) shirt on top of that. With his hands cuffed, the guards would not have been able to have Leone put another shirt on because the cuffs would have gotten in the way.
As around the 1:14 mark, as Leone (Stallone) and Chink Weber are fighting in the yard because of First Base getting killed, as Leone is on top of Chink hitting his face, within a few seconds Chink's face goes from bloodied, to almost no blood, back to bloodied again.