Okay, so here's a thought I had. There are lots of interpretations of the Haltenning, but very few actually make a whole lot of sense. The Indoctrination Theory plays with the idea that the "breath" we see in the Destroy ending is actually Shepard waking up from Indoctrination. As it is, I can't rule that out, but I have serious doubts about IT. So, in an attempt to come up with alternative theories, I've contemplated possible explanations for various plot holes, and this breath in particular has taken my attention. Let's suppose, for sake of argument, that all of what we see in the endings is actually happening and not some delusion or fabrication due to Indoctrination or a fever dream. The Catalyst really is there, saying everything honestly to the best of its ability, and Shepard really does choose to destroy the Reapers. In the process, the Citadel is apparently also destroyed while in geosynchronous orbit around the Earth, meaning that, best case scenario, Shepard is cast out into low-Earth orbit and plummeting through the atmosphere or, worst case scenario, blown to bits. Obviously, any explanation that attempts to give a sensible reason for Shepard being alive would have to take the former of those two possibilities. How could Shepard survive falling from orbit? Obviously, she can't. Or can he? There is good reason to believe that it is impossible for her to have survived the fall. For one, it's impossible in the real world. His body would be torn to shreds in the atmosphere, and that's assuming she could survive long enough without oxygen even to make it TO the atmosphere. A second reason is, of course, that it's exactly how he died before. That's where I think I found a possible solution to the problem. Shepard died EXACTLY the same way at the beginning of ME2. What if, and I realize this is a big if, but what if it were possible that the Illusive Man wanted to protect his investment? What if Miranda and the Lazarus Cell didn't just bring Shepard back to life, but actually made enhancements - such enhancements that would make it possible to survive such an accident happening again?