I am always behind the shopper at the grocery store who has stitched her coupons in the lining of her coat and wants to talk about a 'strong' chicken she bought two weeks ago. The register tape also runs out just before her sub-total. In the public restroom, I always stand behind the teen-ager who is changing into her band uniform for a parade and doesn't emerge until she has combed the tassels on her boots, shaved her legs, and recovered her contact lens from the commode.