E4 or C model engine? Its a bit like.......
KEEPER: Heh heh. Stop! What is your name?
ARTHUR: It is Arthur, King of the Britons.
KEEPER: What is your quest?
ARTHUR: To seek the Holy Grail.
KEEPER: What is the air-speed velocity of an unladen swallow?
ARTHUR: What do you mean? An African or European swallow?
KEEPER: What? I...I don't know that! Auuuuuuuugh!