Has a buck once where I made a hurried shot and didn't get my head down good...hit him high above the heart, 2-3 inches below the spine. He dropped where he stood, paralyzed from the shock to his spinal column, but laid there alert and alive.
I stepped up from behind, stood my 220 pounds on the main beam that was down on the ground, and in one motion shoved a 5" knife blade down in behind the jugular / windpipe and just sliced it right out through both of them at once...