One of the girls failed to break the pencil she was using. The other girl grabbed it out of her hand and started poking her with the eraser in the belly and the ribs. Both laughing, the first girl took off running, screaming "NO PICKLE TICKLE! NO PICKLE TICKLE!" with the second girl in giggling, poking close pursuit.
I about pulled a muscle trying not to die laughing, yet no one else seemed to see anything amiss (several parents and the vice principal were about 10 feet away, and none of them batted an eye at this spectacle). Apparently, Washingtonians have not been acquainted with the phrase "pickle tickle" before. It must be a midwest thing. For those of you who don't get the joke, "pickle tickle" is a rather colorful term for "bumping uglies" aka "playing hide the salami" aka "having sex".