The plumber saw a signboard ‘Beware of the Dog’ at the gate of the house where he had been called to check a leak. He went in very hesitantly. But the dog didn’t even look up and remained fast asleep. The plumber asked the owner, “Is that the dog that you have warned against?”
“Yes.”
“But he looks so harmless. Why did you put up the sign?”
“That’s because people keep tripping over him.”
