"Thump, thump, thump." The loud, evenly spaced sounds were coming from directly behind me. I spun around and unslung my rifle in the same motion. A big buck had waited until I walked by and was now making his escape. I shouldered the rifle and got the fleeing buck in the scope at 30 yards. I instantly saw it was a mature buck nearly 30 inches wide and with long tines, but the mass was on the light side.