ARTHUR: The swallow may fly south with the sun or the house martin
or the plumber may seek warmer climes in winter yet these are not
strangers to our land.
GUARD: Are you suggesting coconuts migrate?

ARTHUR: Not at all, they could be carried.
GUARD #1: What -- a swallow carrying a coconut?
ARTHUR: It could grip it by the husk!
GUARD #1: 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 1 pound
coconut.
ARTHUR: Well, it doesn't matter.
GUARD #1: Listen, in order to maintain air-speed velocity, a swallow
needs to beat its wings 43 times every second, right?
GUARD #2: It could be carried by an African swallow!