The dnd character who lost his heas

So this happened when we first started our dnd campaign. So me and my friend Jordan's previous characters were on a mission to get an artifact. On our way mine and his Character got into a fight about something. So I rolled to uppercut him. FYI Jordan's Character is a 9 foot tall skeleton Character. So I went to roll and got a nat 20 and his head went flying into a pot of soup. I went to get his head and a sea hag appeared. I threw his head at the sea hag and missed and he ended up drowning. He rolled on his savings throws and failed all of them and perma died. That's the tale of how I ended up killing a players Character.