Actor Clint Eastwood of "Dirty Harry" fame was born on this day in San Francisco. He's a tough guy on and off screen. When we met him, he surprised us with his knowledge of construction and tools. Noticing our 16-ounce claw hammer, he asked Morris, "You know how to use that thing"? "Yeah, I guess so," Morris replied. Eastwood shot back "Guess so? That won't cut it." Snatching the hammer from Morris' hand, he grabbed two smooth pieces of wood and -- rubbing them together as he squinted his eyes -- he said, "Nails all work the same way." "Uh-huh," we stammered. "They pull two pieces of wood together like this," he said, hammering hard and true. "And the smoother the boards fit, the better the nails hold" he continued. "Got it?" Handing the hammer back to Morris, he added, "Now you nail, Bud. Go ahead, make my day." And that's the On The House tip for today.