Kim returned to her seat.
About this time, little Johnny began waving his arm hysterically.
Little Johnny was well known for being dirty-minded, so the teacher
was reluctant to call on him for anything. But as the teacher
looked at the picture on the chalkboard, she thought that there was
no way that little Johnny could possibly do anything to make this
picture dirty. So she called on little Johnny, and he ran to the
chalkboard.

Little Johnny had done it again.