“Hey, Greg, what is the air-speed velocity of an unladen swallow?”
“What do you mean, Paul? An African or a European swallow?”
“I don’t know that!” At this point Greg and Paul burst into fits of uproarious laughter.
“Hey guys,” said Abe who happened to be standing nearby, “what’s so funny?”
Greg and Paul gasped in unison.
“What? Did I say something wrong?”
“He doesn’t know,” said Greg.
“Of the quest for the Holy Grail,” continued Paul.
“You guys are starting to freak me out,” Abe began to back away.
“Ni!” cried Paul.
Greg echoed, “Ni!”
“Ni! Ni! Ni!“
Abe cried.

