I like the scene in "Wayne's World 2" toward the end of the movie where Wayne is talking to the gas station attendant, asking for directions to the church where his girlfriend was going to be married. The actor there is so terrible that Wayne stops, looks at the camera and asks if they can bring in a real actor. Someone steps in from off camera, pulls the old man out, and then in steps Charlton Heston. He delivers a tour-de-force of real acting and it's so good that Wayne sheds a tear.
