I was once backpacking in New Mexico . We were going through this valley , and it was getting pretty late , so we decided to stop for the day and setup camp . As it was getting dark there was just this general feeling of unease . When going into my tent and laying in my sleeping bag , I remember this feeling of something watching me from the top of the mountain . The next day we pack up and head out . Maybe 100 yards down the trail from our campsite we find a deer that had been recently killed and eaten by a mountain lion . The lion must have been near our camp , and if it hadn ' t found that deer , we could have had a very bad night . The whole thing still gives me the heeby jeebies . <| sep |> RIP Headphone users