Above the lungs, below the spine?

I have butchered a bunch of deer, but can't say I've ever seen one with any muscle below its spine, except the T-loins, and they are not above the lungs. If a deer has exhaled fully, and a bullet strikes just below the spine, it may not hit lungs, but that deer shouldn't go far.

I know for a fact that I have hit a deer too high, above the spine, and seen the same thing happen. Deer dropped instantly, but before I could reload its legs started thrashing and off he went. That is what I would say happened. Now you need to figure out why you hit high at 70 yds. In my case, I overestimated the range to the deer and held high on the top of the shoulder. That's where I hit.