Why did Krishna depart in a seemingly mundane way?

If one studies the events surrounding Krishna’s departure it is clear that they were entirely spiritual, defying all material logic. Firstly, Krishna disappeared because of an arrow shot to His leg. Do we have any experience of such an injury being instantaneously fatal? Secondly, Krishna was so pleased by the hunter who shot Him that He sent him back to Godhead. Unless someone was in complete control, orchestrating the entire sequence of events, could they react in such a way? Thirdly, Krishna showed on numerous occasions that He could overturn death if He desired (e.g. bringing back the dead son of His teacher), but chose not to in this situation.