Half-Brain
(A tourist walks up to me at the front desk.)
Tourist: “Is that Half Dome outside?”
Me: “Half Dome is one of the many mountain features outside if you face east.”
Tourist: “Which one is it?”
Me: “It is the one that is exactly half of a granite dome… to the east.”
Tourist: “How much concrete was used to make it?”
Me: “… Seriously?”
Tourist: *stares blankly at me*
Me: “I couldn’t tell you, but they decided to ditch the building project once they ran out of re-bar.”