My dad used to tell the story about taking a ride across the other lanes when a corner of the plow hooked on a railroad rail at a crossing. It happened in the early 60's and he would plow for the state of Idaho Highway Dept. during the winter as he worked for the Forest Service in the summers. This was on US 10 (now I-90) thru North Idaho. One night they asked him to go up to Lookout Pass to help as he normally plowed a section further west. On the trip to Lookout (20 miles or so), US-10 had several rail crossings. One in particular was at an angle to the direction of travel (not perpendicular or straight across) as the road, river, and railroad wind up a valley. As he came to the crossing he raised the plow up off of the road surface, but there were some frost heaves just before the tracks. As the truck went over the frost heaves, a corner of the plow dipped and hooked on the rail. With the momentum of the truck (dump truck with a sander/spreader body in the bed) and the plow hooked in the rail it shot him at an angle across the other (oncoming) lane (US10 was only 2 lanes at that point). Luckily no one was coming the other way and he was able to get it stopped before the edge of the road which was the river and a railroad bridge. He claims that they had to pry his butt off the seat from the pucker factor! He said they had to fix the cutting edge bit and the corner of the plow but no major damage. He also said that he also always slowed to almost a stop at that rail crossing from then on.