Upon entering the little country store, the stranger noticed a
sign saying "DANGER! BEWARE OF DOG!" posted on the
glass door.

Inside he noticed a harmless old hound dog asleep
on the floor besides the cash register.

He asked the store manager, "Is THAT the dog folks are
supposed to beware of?"

"Yep, that's him," he replied.

The stranger couldn't help but be amused. "That certainly
doesn't look like a dangerous dog to me. Why in the world
would you post that sign?"

"Because," the owner replied, "before I posted that sign, people
kept tripping over him."