Little Johnnie’s teacher asks three class if they saw anything interesting on the way to school.
Little Susie said she saw a fluffy dog.
Little Billy said he say a train.
Little Johnny said he saw a “flat” dog.
“Oh” said the teacher. “That’s terrible! Was he run over?”
“No” said little Johnny.
“Well how do you know he was flat?”
Replied little Johnny “well he must have been! There was another dog PUMPING him up”