Same thing that happened to me with my buck last year. I smoked him at 10 yards. I had no doubt he'd be dead on the hillside behind me. I chugged a beer to celebrate real quick and went to gather him..... or not. I was floored. I got backed out and decided to come back the next day. Fortunately, I had parked at a back entrance to the land I was hunting so I got in my truck and went driving to the landowner's house to explain that apparently I didn't hit him as well as I thought. Fortunately on my drive back i saw the white belly in a ditch across the street from the hill I thought he should have been dead on. Ended up going 200 yards across a road and a creek.