Who's there?
Police
Police
who?
Police, can I stop telling knock knock jokes!
Who's there?
Usher.
Usher
who?
Usher wish you would let me in!
Who's there?
Impatient Pirate.
Impatient Pirate
wh-
ARRRRRRRR!
Who's there?
Nun.
Nun
who?
Nun of your business!
Who's there?
Cook.
Cook
who?
Hey! Who are you calling cuckoo?
Who's there?
Doctor.
Doctor
who?
You've seen that TV show too?
Who's there?
Police.
Police
who?
Police hurry, I'm freezing out here!
Who's there?
Diploma.
Diploma
who?
Diploma is here to fix the sink!
Who's there?
Major.
Major
who?
Major laugh.
Who's there?
Doorbell Repairman.
Doorbell Repairman
who?
Ding Dong! My work is done here.

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