The dental flossier has a flat handle that will make it easy to hold once it gets wet. The winch drum has a rope-receiving surface with a plurality of raised ridges defining substantially helical channels between them. The system of the another vehicle sends back a vehicle ID signal to the stopping vehicle when a predetermined beam pattern is recognized by the processor. The grounded plate is adapted with openings that remove electrons and ions from the plasma admitted from the plasma cavity into the processing space to provide a downstream-type plasma of free radicals. A speed sensing sensor is positioned such that the speed sensing sensor passes over the series of markers as the MICR read head passes over the magnetic ink character data on the document.