two more theory and it will be the last >_<

 

I don't think that is Arthur's skull. It looks like a human skull.

 

Guys, it's a fail troll, they just want reactions.

 

thanks usar the next theory would be why misery attacked quote while she out of the doctor control
and after that I'llanswer why arthur skull looks like human

 

Arthur was killed by the doctor, so it is not possible for that to be his skull. That is just the skull of Miakid, nothing more to it than that.