Being attacked from the rear when one's rear is most exposed, by something from the mysterious depths of the lavvy u-bend is a fear universally played on. Remember Arachnophobia? Heard of New York's sewer alligators? Pity Deptford's Maxine Killingback, then, who was distracted from the job in hand by the frantic scufflings and splashings of an unfortunate rat in her toilet bowl. Ms Killingback has rheumatism in her legs and back and couldn't move......