A guy I knew in the USArmy told me this one, before he joined up him and some of his friends were on a road trip in a camper and were spending the night at a park in Tennessee or Kentucky if I remember correctly. They were partying pretty hard and one of his friends had a cassette recording of a mountain lion screaming, they had an awesome sound system in the camper and they played it for a minute or so and turned it off. The park was crowded with other people on vacation and after they played the cassette you couldnt see a soul outside. Not long after a police cruiser showed up and was shining a spot light all over the woods surrounding the park looking for a mountain lion.