There is a chest in the Archer's Line region of the Moon that is literally impossible to open. From the spawn location, go up the hill and towards the left and into the bunker that's divided in two. In the half closest to the spawn point, there is a chest that can spawn on top of a cabinet just slightly above head level. You cannot open that chest. Period. If a chest ever spawns in that location then no players can open it. It simply doesn't give you the option. This video shows the chest close up: http://www.youtube.com/watch?v=pCZI_eHnzVs Here's a map of Archer's Line with the chest location marked: http://i.imgur.com/sMaAnMf.jpg