A tomato was crossing the road with another tomato he had just met. He believed her to be a real "hot tomato" and not just because the heat was 90 degrees. As they were crossing the street, the "hot tomato" almost got hit by a car. You better catch...all of a sudden, a car hit the hot tomato and smashed her. Oh no! Ketchup!!
With just a tad variation on the one told to me when I was subbing for a third grade class.