The rundown: Stephan Bonnar needs therapy so he reaches out to Dr. Chael Sonnen, Psychotherapist. Bonnar's teary-eyed complaint is that he's supposed to be "The American Psycho" but no one takes him seriously anymore.
In fact, it takes him back to his childhood when all the kids called him "Stephanie Boner."
Dr. Sonnen gives him a tissue and simply tells Bonnar that if he wants to be his old self again, he needs to become an actual psycho. A master of psycho, even. That includes calling himself champion of the light heavyweight division, despite the fact that Jon Jones, he who lugs the 205-pound title around, beat him already.
Since when has that mattered to Dr. Sonnen, though?
By the time Bonnar leaves the office, he's transformed from "The American Idiot" to "The American Psycho" once again.