* * * * *
Knock Knock.
Who's there?
Cows go.
Cows go who?
Cows don't go who, they go moo.
* * * * *
Knock Knock.
Who's there?
Dwayne.
Dwayne who?
Dwayne the bathtub, I'm dwowning!
* * * * *
Knock Knock.
Who's there?
Boo.
Boo who?
You don't have to cry, it's only a joke.
* * * * *
Knock Knock.
Who's there?
Little old lady.
Little old lady who?
I didn't know you could yodel.
* * * * *
Knock Knock.
Who's there?
Roach.
Roach who?
Roach you a letter, did you get it?
* * * * *
Knock Knock.
Who's there?
Etch.
Etch who?
Bless you!
* * * * *
Knock Knock.
Who's there?
Wada witch.
Wada witch who?
Wada witch you a Happy Halloween.
* * * * *