Roofer's helper on the ground, calling to his boss on the roof: "Hey, Boss, did I leave my hammer up there?"
Boss: "What's that you say?"
Helper: "Did I leave my hammer up there?"
Boss: "What?"
Helper: "DID I LEAVE MY HAMMER ON THE ROOF?"
Boss: "What?"
Helper (muttering, sotto voce): "Gosh, what an idiot."
Boss: "I HEARD THAT! "