noon
Bart selected a crowbar and his efforts to twist and snap the chain resulted in final success . With a thrill of satisfaction he sprang upon the car . The handles moved easily and responsively to the touch . A grumbling roar caused him to survey the sky , which had been dull and lowering since noon . `` Storm coming , '' he murmured -- `` now for action ! '' Bart started up the car . It ran as smooth as a bicycle .