An account in Christian County, Illinois

My experience happened late June to early July of 2012. Rural Christian County. Between 8:00 and 9:00 pm. I was relaxing by the fire texting and listening to my ipod. Watching a few cars pass the house. To my left was the farmhouse, to my right was the driveway and a few out buildings plus tall weeds (about 4 feet tall) in an old pasture. Several feet behind me was the pole light and machine shed. I felt an eerie sensation to my right. I looked in that direction. I thought my eyes were playing tricks on me. I could have sworn I saw an outline of a head and shoulders above the weeds. I continued to look in that direction and shrugged it off as my imagination. I went back to texting. Glancing to the same spot occasionally. I kept hearing a slight noise to my right. And I would look up. Out of the corner of my eye I saw a rolling limestone rock. I didn't think about it at first. Then I realized that rocks don't move by themselves. I was freaked out and went inside. The next morning I went to investigate what could have formed the shape I saw. Nothing was there. I did find several sticks, corn stocks, and dirt clods in the driveway.