To this point, Liz had been an efficient soldier, firing only when necessary and achieving a killing shot with each pull of her trigger. As the soldiers began moving out, Liz was neither first nor last to move; she positioned herself somewhat in the middle of the movement, but still with enough room for movement and return fire if necessary.
Now, as they came into a room with no apparent exits, Liz shook her head. That's when she caught sight of the grate on the wall. A flicker of what could have been amusement crossed Liz' face and she thumbed the safety on her rifle, slinging it over her shoulder. But the flash of emotion was gone faster than it appeared as Liz drew a pistol and crawled into the hole, just ahead of Alex, behind Tirin.