I don't think it's that hard to believe. I live in southeast Nebraska and there has been proof of more than a couple mountain lions in Nebraska. Last year there was one that was run over on the freeway in Omaha, as well as one that was shot by a police officer in a small town in central Nebraska. I'm not saying that there are starting to be mt. lions actually living in the area, but they do pass through. If the mountain lion saw you and got out of the way, I would say he/she is prolly gone by now. Start to worry when you see both a male and a female in the area. THen maybe, they are actually using your land as a core area.