Upside down, up, or what? Doesn't matter in space.
The second spacewalk of STS133 has been completed. Astronauts Stephen Bowen and Alvin Drew managed to prepare a broken ammonia tank for later return to the surface, and keep the toxic ammonia spray away from the station and spacesuits. You don't want that stuff getting into your air supply.
Working on the Canadarm2.
The astronauts performed other tasks working to leave the station in great condition for the time when the shuttle doesn't return to the ISS. At the end though, one of the astronauts had a broken light fixture on his suit which prompted the early end of the spacewalk. Despite the strange end to the spacewalk, the objectives were completed and the mission goes on.