The Adventures of Buckaroo Banzai Across the 8th Dimension1984

From the "Pinky Caruthers Unknown Facts" DVD feature:
There is a term sometimes used at the Banzai Institute: The Three Bs, meaning the Bus, the Bath, and the Bed. That is where the greatest discoveries are made in science. When one is at his most relaxed, her most receptive... that is when a foreign consciousness, a "stray bullet" as B. Banzai calls it, may pop into one's head.