The angle is irelevent from the hitting a branch and it could have hit a rib and deflected it in a different direction!!! JEEEZ!!The buck in my atvar hit mid bodywhen I shot him on the ground andhit arib and angled up into the bottom of the spine and dropped him in his tracks. I was on the ground the arrow angled up. Lets get over the angle. If there is meat on the arrow it went under the spine. It's fat and skin on top of the deer, and if it went over the spine with a three blade there would be some slicing of hide I just see holes.

Like I said before there is a small void under the spine and there is some meat there, backstraps. The guts don't rest on the spine.