This happened on Tuesday. He's in the class I had on Monday. He was acting weird in class on Monday. He interrupted lecture to deliver a rant on how the medical community shouldn't tell him how many hours of sleep he needs (I should mention the lecture was related to sleep research). Also, before class he explained to one of my classmates how most grad students are incompetent and their thesis work is bullshit. Then he handed her a book about the Rastafari movement. He excused himself from class nearly an hour early, telling the instructor that "he had a lot going on" and that he was hungry.