chunk: The cart creatures suddenly begin attacking Jarvis and Tweel, who retreat up a corridor which fortunately leads outside. The cart creatures corner them and, rather than save himself, Tweel stays by Jarvis' side facing certain death. The cart creatures are about to finish them off when an auxiliary rocket from the Ares lands, destroying the creatures. Jarvis boards the rocket while Tweel bounds away into the Martian horizon. The rocket returns with Jarvis to the Ares, and he tells his story to the other three. Jarvis is preoccupied with recalling the friendship and bond between Tweel and himself when Captain Harrison expresses regret that they do not have the healing crystal. Jarvis, his mind somewhere else, admits that the cart creatures were attacking him because he took it; he takes it out and shows it to the others.