From Vertigo, directed by Alfred Hitchcock, screenplay by Alec Coppel & Samuel A. Taylor, based on the novel D'Entre Les Morts, by Pierre Boileau and Thomas Narcejac
"Scottie: What about my acrophobia? What about... Now, suppose, suppose I'm sitting in this chair behind a desk, here's the desk, and a pencil falls from the desk down to the floor, and I reach down to pick up the pencil - BINGO - my acrophobia's back.
Midge: (Laughing.) Oh, Johnny-O."