I am the broken train door that slides relentlessly back despite the greatest efforts of my stuttering motor. I say, "swishhhhhhhhhh, click bump slap" as the wall-lips try desperately to gobble up my rubber window-gasket. But my faithful motor brrrup brups me out of the steel mouth. We sigh together- relieved, perhaps, at our great unfailing escape. I shut. Welcome rest. But I am the broken train door, and again I slide. The motion wakes from brief respite that old, tired motor. Again it drags my body up the track and again "swishhhhhhhhh, click bump" past that angry metal mouth. At last I shut. Motor rests. But I am the broken train