ABC

Johnbull had just learned his ABCs and was very scared of reciting them in front of his class.
He stood in front of the class trembling and began.
"A B C D E F G H I J L K M N O Q R S T U V W X Y Z."
His teacher said,
"Very good, Johnbull but you forgot the P. Where's the P?
He replied, "It's running down my leg."