Dozens of people enjoying hayrides at a Wisconsin apple orchard suddenly found themselves part of a mass casualty event Wednesday morning. Per CBS News’ telling, one wagon apparently lost control while coming down a hill and crashed into another wagon, but WISN reports a tractor was pulling two hay wagons at the time and one of them overturned after losing control descending the hill. Twenty-five people were taken to the hospital, three of them with life-threatening injuries. Five others had injuries described as serious. Students from a school field trip to the orchard were involved, and chil…