Beware of Dog!

As a man walks into store, he noticed a sign on the door,
“BEWARE OF DOG”. He cautiously walks into the store. Lying in
the middle of the floor was an old German Shepard. He asks the
clerk behind the register, “Is THAT the dog the sign is talking
about?!” The clerk replies, “Yes, before we put up the sign
people kept tripping over him!”