(As Rudy comes downstairs to the living room with her constume on.)
Cliff: Whoa, where are you going, to a wedding!?
Rudy: No. Trick or Treating!
Cliff: Trick or Treating? What's that?
Rudy: It's when you dress up and you get a lot of candy!
Cliff: Oh! When did they start this?
Rudy: When I was three!