Oscillator bars roll down at high speed. Oneway spaces hide in the higher dimensions, pretending that they are part of the universal expansion in types of space, internal, external, or at new angles to everything known, which the recent explosion in the sale of dimension franchises (North America is fully covered with 37 counted, as of yesterday) has promised to facilitate. Some of these new dimensions, however, are just cheap copies of the older ones, and don't offer much more motion than you can see here.