After an unfortunate accident on touchdown, the lander tipped over and lost it's main engine and crew pod from the impact. With it's life support system (the blue/grey thing under the capsule) No longer connected to the solar panels and batteries of the service module (blue things), the crew pod is no longer able to produce zoxygene for Jeb, so he had to open the vent of the reserve tank. This will get him a few more hours to deliberate how to improvise a solution for his life threatening situation. Here we see him searching his wrench, which slipped out of his hands due to the thick gloves and fell to the ground, while he was about to unscrew the protection plating from the top of the lying service module. But, of course, as a hero like he is, this won't hold him off from ripping out a few no longer needed cables and building a new powerline from the solar panels to the life support on his capsule!
