[atch]

Many years ago there was a restaurant here in Columbia, Missouri owned by "Poor Ken" and "Lonesome Del". They made their own tv commercials using a blackboard and chalk with "pi r squared" (the actual mathematical symbols) written on the board. One would say "pi r squared". The other would say "no, pie are round". Then "pi r square". Then "no, pie r round". This went on three or four times then one miraculously had a pie in his hand and said "pie r messy" as he hit the other one in the face with the pie. They made many of these commercials but the wording and the pie-in-the-face were always there.