The mare might be dead already.
First off, she's wandering around with only that jacket, and it's cold. If nothing else gets her, that certainly will.
Second, she isn't wearing anything over her mouth. She's breathing in all the ash in the air, and crystal flakes or no, that's not good for the lungs.
Thirdly, and by far most likely to kill her (or worse) in the next two minutes, she's been shouting her head off. With the wind this strong, the sound won't carry that far, but it's far enough, and she's even closer to the town than I am. If I were a reasonable pony, I'd stay put. It'd be stupid to not only risk my own life but the life of the one relying on me too.
It's a good thing I'm not a very reasonable pony.
I shoulder off my pack as quickly as I can and bolt back down the hallway, backtracking into my entrance room. The window shatters when I throw it open but I barely notice. I leap out onto the powdery ground outside. It's a real chore to run with snowshoes, but I'm in way too deep to back out now.
I'm bounding awkwardly down the hospital's hill when she notices me. She shouts something but I can't hear it over the blood pounding through my head. I wave her to me as frantically as I can and I see her pupils shrink to specks. Good, she knows something's wrong.
I make it to her side and hook a foreleg under hers, pulling us into a loafing struggle upwards.
"Who are you?" She shouts at the top of her lungs directly into my ear.
I cannot have her screaming her head off. "I'm the one trying to save your stupid life!" I shout back as loudly as I dare, "so shut your damned mouth and move!"
When we get to the ruined window I shove her through, dive in after her, and slam it closed behind us. After I yank the curtains shut and turn around, I scoop her up off the ground and shove her into the hallway, pulling the door shut behind us, and then I stay perfectly still.
"Ah... Ow..." I look back and wince. She's got shards of glass sticking out from bits all over her forelegs and she's bleeding at a pretty alarming rate. My eyes widen behind my steamed-up goggles. Ah, crap.
"Shh, come on," I whisper. "Can you walk?"
"I... Um..." She's just staring at her legs. "Sorry, I just... I..."
"Come on," I say, helping her to her hooves as gently I can. "Come on."
I sit her down next to my pack, at the windowed room's wall. It's a good thing I carry gauze, she's gonna need all of it. She didn't get too much glass stuck in her, luckily, and once I pull the shards out, I wrap her legs up tight. She hisses a little during the process but otherwise holds her limbs out for me perfectly still, stoic as can be. Just like I remember. How 'bout that?
I finish bandaging her other leg when she finally decides to speak. "...what happened to Ponyville?"
"I, um..." I swallow. After all the excitement, it's kind of hard to find words. "I didn't know this was Ponyville." It doesn't help that I'm distracted by the view outside.
"But..." she trails off, then tries again. "Why'd you drag me all the way in here, huh?"
I point out the window. and she follows my hoof.
"What. Is that?"