This happened to me with my first deer when I was 12. I was with my dad and we saw two does. He told me to shoot the largest of the two. I aimed and shot, and the smallest doe dropped in its tracks and the one I was aiming at ran off. I didn't know what had happened and started to frantically tell my dad I was aiming at the largest doe, and he said you dumb@ss you shot them both. The doe I was aiming at went about 30 yards and fell dead from a perfect heart shot. My dad got to burn his tag that year on a small doe. I was so focused on the target animal I didn't see the smaller doe slip behind at the last moment. No buck for my first deer, but I did take 2 with one shot.