It's dark in there, and slimy. But the slime doesn't slip under their feet or linger on their hands when they touch it. Very well-behaved, that slime.
The tunnel angles downward. When it forks, Naomi blocks the same-level fork with a wall of living Clay, to direct the mutants down the fork that leads to the next level down.
First Naomi and her suitcase are getting close to the border. Third Naomi is the one nearest the mutants. She sighs, abandons her latest Tunneler spawn, and slime-slides up the tunnels to meet them; she can't think of a way to get a raccoon to mime 'please ride the sixty-mile-an-hour underground waterslide to Canada', and she doesn't want to alarm them by snatching them away without warning, so this is going to require actual human words.