Thanks to my 4 year old, I am renewing my love for classic cartoons. Only now I can look up things I previously took for granted.
Case in point is the Bugs Bunny episode "High Diving Hare". In it there is a scene where Sam is yelling at Bugs to "Open the door! Open up that door!". Sam then turns to the audience and says; "You notice I didn't say Richard.". Well he is referring to the 1947 song "OPEN THE DOOR, RICHARD" which was popular at the time.