Pee-wee's Playhouse (1986–1991)
Pee-wee: You all remember what to do whenever anybody says the secret word right?
Pee-wee: That's right. For the rest of the day, whenever anybody says the secret word, scream real loud. Ready? Let's try it.
Salesman: I'm going door-to-door to make you this incredible offer!
[Pee-Wee screams and slams the door on the salesman]