Hyena Ha-Ha

An old man took his grandson to the zoo, but was so deaf he had to keep asking the boy what the tour guide was saying.

When they got to the hyena cage, the guide said: "This is the hyena, sometimes called the 'laughing hyena' because of its bark which sounds like laughter. This animal has a very efficient digestive system, eating at least fifty pounds of meat a week and yet evacuates only once a month."

The old man turned to his grandson "Huh? Huh? What did he say?"

The boy patiently repeated the guide's comment.

"That's stupid." the old man snorted. "If that SOB eats fifty pounds of meat a week but only craps once a month, I dunno what the hell it's laughin' about!"