A Stranger walks into a Ma and Pa store and spots a sign:
“Danger! Beware of the Dog.”
As he enters, he sees a harmless old dog, fast asleep in the middle of the floor.
“Is that the dog we’re supposed to be aware of? The stranger asks the owner.
“That’s him.” The owner replied.
“He doesn’t look dangerous to me. Why would you post that sign?”
“Before I posted the sign, people kept tripping over him!”