In the last 10 minutes of the movie where they are in line to get work in jail, Tyron is holding Harrys RIGHT arm covering his track mark, and as soon as Harry is knocked to the ground by a prison official we see our good friend Harry lying in pain on the ground and it's his LEFT arm which sports the ever-growing trackmark. Then again, when the camera pans up and away from his body in the hospital bed, they seem to have cut off his LEFT arm. Talk about your hospital negligence.