The lander is sinking, and Phillip worries that it's about to hit a rock. Philli thinks they've hit something, but he can't figure out what it is. They'll have to take off again, he says, because the fuel tanks aren't big enough to hold all the weight of the lander. The only thing they can do is to use the jets, but that won't help, because it will just slam down into the ground. They have a plan, though, and they're confident that they'll land safely.