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.”