The ohio law refers to passing a vehicle in your lane to make them aware you are passing. Too many accidents from people passing a slowing car and the slowing car making a left turn into the passing car, not every time. Not quite as bizarre as it sounds initially like most of the others. They were funny though. I'm pretty sure there's somewhere that has a law against getting a fish intoxicated but I can't remember where. I'd love to hear the events that led up to that one though.