They parked the bus and saw the great beast, destroying buildings as it roared a mighty roar. They see the space station, or as the locals call it, Helios, firing moonshots at it, doing nothing. Tari see a moonshot miss, and crash into a burning building, and informs bill about it.
They go back into the bus to get guns, lots of guns. Bill grabbed a sub-auto machine gun, while Tari got a sawed off shotgun. They walk into the town, and began to shoot up the hatchlings, that were hatching off the great beast.
While bill covered her, Tari manages to open the missed moonshot by finding a override switch. What they find is a Tsar Bomb inside, and Bill says, "One of us has to activate it manually, you know. Since the remote detonator is up there in that space station." Bill helps Tari pull it out of the moonshot.
"I can handle myself, you go on and get!" Says Bill, who has sacrificed himself before. Tari does what she is told, and retreats back to the bus, and tells the driver to move it! They will in the tunnel when the nuke went off, the shockwave pushed the bus on its side, and they had to move on foot. Tari salutes the sacrifice of bill, and walks off, into the pandora wastelands.