Winter readjusts his aim and fires again, this time for her limbs, trying to make it harder for her to move, since a simple headshot clearly isn't going to kill her. He advances after her, steady rather than fast, keeping pace but not trying to get any closer. For now.

The sounds don't mean anything to him yet. Maybe she'll try to stab him with tunnel walls. At least he knows even if he dies here, he won't die out in the waking world.