Guard: Where'd you get the coconuts?
King Arthur: We found them.
Guard: Found them? In Mercia?! The coconut's tropical!
King Arthur: What do you mean?
Guard: Well, this is a temperate zone.
King Arthur: The swallow may fly south with the sun or the house martin or the plover may seek warmer climes in winter, yet these are not strangers to our land?
Guard: Are you suggesting that coconuts migrate?
King Arthur: Not at all. They could be carried.
Guard: What? A swallow carrying a coconut?
King Arthur: It could grip it by the husk!
Guard: It's not a question of where he grips it! It's a simple question of weight ratios! A five ounce bird could not carry a one pound coconut.
King Arthur: Well, it doesn't matter. Will you go and tell your master that Arthur from the Court of Camelot is here?
Guard: Listen. In order to maintain air-speed velocity, a swallow needs to beat its wings forty-three times every second, right?
King Arthur: Please!
Guard: Am I right?