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.
Character mistake: The nurse that was helping the doctor tend to Clay has blood all over her gloves. As she leaves the room, she takes off one glove. No hospital anywhere would allow doctors or nurses to roam the hall with bloody gloves and hands. It's a health hazard.