Also saw this music themed joke today (courtesy @dubber on Twitter)
"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?"
"Knock knock!". "Who's there?"
"Knock knock!". "Who's there?"
"Knock knock!". "Who's there?"
"Steve Reich"