I shot a small buck in the liver and rear part of the lungs once. He was about 7 yards away from the tree I was in and quartering away. I aimed to place the arrow behind the offside front shoulder. At the shot, he took a step and I hit a lot farther back than I wanted. I was sure I had just gut shot him. It had been raining, but with the assumed gut shot, I was going to wait a long time to start tracking. About 15 minutes later, it started raining again. So as not to lose the blood trail, I got out of the stand quietly to check my arrow that I could see on the ground after passing through the buck. You could not have gotten any more bright redblood on that arrow than what I found on it. I looked in the direction he ran and saw a white spot - he only made it about 75 yards! I think this shot was so quickly fatal because I had severed the main artery serving the liver as well as the rear part of the lungs. Heck of a smelly field dressing job, though!