In the movie, he plays a 'demented' man trying to survive on the streets of Los Angeles.
Her 'demented' ramblings are a symptom of her illness.
parents who are almost 'demented' with worry
(..) -Come on, Rapunzel. -Mother, wait. I think I think he likes me. Likes you? Please, Rapunzel, that's demented. -But mother, I... -This is why you never should have left. Dear this whole romance that you've invented, just proves you're to naive to be here. (..)2010 Tangled