Back at the cave, the two men discuss how they're going to get out of the cave. First, they have to push a bridge over to the other side of the wall, and then they'll be able to walk on the bridge. But first, they need to figure out how to escape from the dome of the building, which is surrounded by water. They can break the dome by using a parabola, but they can't escape because the dome is so big. Finally, they figure out a way to get into the coffin, but it's too small.