[There are times when the body can't be given the vote, when the mind has to keep it moving anyway because something important is at stake: If Spock doesn't keep going until they can get inside, his condition may well worsen.

Ami keeps her voice firm, and steady, to distract him and reassure him.]

It really is close. Here... [She slips off her own jacket.] Wear my coat. It might be small, but... it will still give some warmth. Right now, my body is in better condition to be cold for a few minutes.