Makes me think of an old movie with Dudley Moore & Daryl Hannah, called Crazy People. He's an ad exec who gets committed to an institution, where the whole gang gets in on writing truthful ads. Quite unknown & yet quite funny movie.

David Paymer steals the show with his use of "Hello," his favorite word ... the Hello Song kills me to this day.

Worth a rental if you've never seen it.
Jimbo