A fire engine was racing towards an emergency with all its sirens blaring. But as the firefighters looked out of their window they could see a little man jogging along beside them. They tuned the engine to full throttle to the sirens to full blast but no matter how fast they went the little man was still there.
Finally sa the driver stuck his head out and shouted "Why are you following us what do you want?"
The reply " Two cones a ninety-nine and a can of cola please!"