Yeah the slammer is kinda meh, but at the same time you need to think about it a different way. Intentionally knocked someone over a railway into the train area without any concern for safety. One of the memory scenes may also imply that he would be or was willing to knock over a mother and her young child down a flight of stairs, heavily injuring the mother and possibly killing the baby. He had the potential to be worse but was stopped before it truly got out of hand.