Character mistake: Tig gets bit on the right butt cheek. Tara tells Chibs to give him a local, which is a numbing injection so she can stitch him up. Problem is that Chibs does the injection in the left butt cheek. You are supposed to give the injection close to the wound to numb it before stitches.
Factual error: When the fat insurance guy wakes up from being drugged, he bites Tig on the butt. There's no way a person can bite through a pair of jeans. It shows the wound and there's a tear in them and blood. It looks as though a dog bit him, not a person.