Knock knock.
Who's there?
Knock knock.
Who's there?
Knock knock.
Who's there?
Knock knock.
Who's there?
Knock knock.
Who's there?
Knock knock.
Who's there?
Knock knock.
Who's there?
Knock knock.
Who's there?
Knock knock.
Who's there?
Philip Glass.
(This would get a real guffaw at someplace like Juilliard).
Don Firth