I see people saying that his father figure in this, is actually his father, and that he's abusive. Way I see it, he's part of his determination to wake from the coma. Fatty fatcakes was blocking the way to continue through his mind, and his dad told him to pop him. If you'd said no when he asked you to, He would say "If you don't, I'll kill you." Which shows that if he isn't going to go further, he'll stay in a coma, and die.