i really like how they kept showing Ishida jumping into the water with completely different intentions and emotions. each dive becomes more and more serious as they were the severeness of the consequences for his actions. the first few dives in his younger years showed him being totally unharmed because apologies as kids are less serious and more forgiving where as the last dive that hospitalized Ishida representing the consequences of him running away from his guilt and procrastinated in actually apologizing and admitting to his wrongs all those years.