cows go

( Lightguy hail satan, Sun 7 Jun 2009, 3:21, archived)

That's not an answer to "who's there"
You're rubbish at knock knock jokes.
( Pickle Fairy is clumsily dancing away this fear, Sun 7 Jun 2009, 3:22, archived)

no, cows go "moo"

( Lightguy hail satan, Sun 7 Jun 2009, 3:22, archived)