Bob: Knock, knock.
Pete: Who Is there:
Bob: Madam?
Pete: Madam who?
Bob: Madam old car broke down!
.................
Bob: Knock knock.
Pete:
Who's there?
Bob:
Alex.
Pete: Alex who?
Bob:
Al explain later .............
Bob: Knock knock.
Pete:
Who's there?
Bob:
A little old lady.
Pete:A little old lady who?
Bob:
I didn't know you could yodel.
