Tali reaches for the clasps on the mask and Shepard can't help but do the mental math - the camp is, what, a few kliks north? She can carry Tali that far across her shoulder without much issue, but it's not going to be a fast trip. Halfway, she thinks. Get her halfway and then plug her with the hypo needle from Ajna and hope the boost to her immune system is enough to get her the rest of the way to medical. As long as someone's still manning the rover instead of screwing around the basecamp (and she's willing to bet credits at least Anders is - the workaholic), it'd be fine.

The hiss of the mask releasing sharpens her to the present, attention crosshair locked. She lengthens her stride the whole half step required to get slightly out in front of Tali - to give herself a clear vantage of her friend's face in case something in her expression shifts or drops or, hell, in case her face balloons from some kind of allergic reaction. Whatever. And it's-- weird. Seeing Tali without the mask, all pale flesh and thin drawn lines, eyes all ghostly bright without the dense material cutting down on how reflective they are.

"You look fine - as far as I can tell, anyway." Would she be able to recognize it if Tali didn't?