We lived on east 1st street in Hoisington, Kansas back about 1982. I was upstairs in our bedroom one afternoon. I was tired and wanted a nap. I lay down diagonally across the bed on my stomach, or my right side actually, with my right arm and leg extended down toward my feet, and my right knee bent up and my right arm above my head. My wife came into the room and sat down on the edge of the bed. I felt myself rolling toward the depression where she sat, so I caught the edge of the bed with my left hand and held on to keep from rolling. I waited for her to say something, and when she didn't after several seconds, I turned and said, "Well, are you going to say..." and that's as far as I got. The edge of the bed was indeed depressed, but no one was there. Well, I was tired, and my wife didn't need me for anything after all, so I shifted my position so I wouldn't roll down toward the depression and went on to sleep. When I awoke a couple hours later, the depression was gone.