The explosive potion had been filled in to the metal pipes. Walker was stepping through the air with extreme caution dropping the pipes in a way that they stuck in to the ground. Their landing was enough to cause a slight disturbance, however, with a little hunter trick, the monsters did not come out to change the terrain and clean up as they would.
The hunter trick to make a prey remain within a small burrow or den was simple. Purposefully made noise nearby so that they believed a predator was around. Meanwhile, that noise was actually just a cover as a hunter would set the real trap at the entrance of the monster's den.
Simple but also very useful right now. The noise from other soldiers moving right beneath Walker was enough to keep the false rats from moving outside their nest to clean the area and keep their dens hidden. Walker also had the mind to keep an eye on the quick soldiers below him.
