He enlisted the aid of his trusty Bumbo and hatched an escape plan: make a mad dash for the border under the cover of naptime. The plan was going off without a hitch, that is until the house dogs--aka "the lapdogs"--saw their chance to curry favor with their owners and ratted them out with a few well-timed barks from the window.
Freedom was so close, Jack and Bumbo could taste it.
Lesson learned: Next time, before disembarking, remember to grease the skids with the dogs.