JJ peeks out from around cover making sure to stay below the trenches. He sees Cannon's foot disappear around cover, so he quickly follows after him. Using the ample amounts of ash created by the nuke, JJ starts slamming a bunch of the stuff at relatively high speed, and then forming a thick wall. A few trenches are blocked off, including the most direct one, but most are still open. Any ash walls outside of a trench are also blown away by the blast.