A cop was approaching from about a block away, thinking to himself, "Boy, my eyes must be going. It looks like that woman is hanging out of her blouse."
But, as he got closer, it became apparent that she really was hanging out her blouse.
When the officer got face to face with the woman, he said, "Miss, are you aware that I could cite you for indecent exposure?"
"Why, officer?" the woman asked.
"Well," said the officer, "Your right breast is hanging out of your blouse."
The woman quickly looked down and screamed, "Oh my God! I left my baby on the bus!"