"Well, we've had our accident," Autor says, sitting back on his haunches. "Let's hope it's the only one. Are you sure that you're all right? Goodness. That gave me quite a fright, and I'm sure it did for you, too."

Autor stands, resting the drill hand against his hip and offering his free hand to his friend. "I'll find a mop and clean this up. Then maybe I can get some drilling done, sans more accidents."