I've always been curious about the vents all throughout the Rasputin on Earth. You guys ever see these? There are 5 I think, all with interiors on the other side, rooms. You can see most during the Saber strike. They lead to other rooms, u can see them when u peek through the vents. The framing for the vents is the same as the Sleeper. So strange.. Side Note: Rasputin has that weird music associated with him. You know the sound you hear when u play that DB mission with Rasputin. When the doors open it plays his tune. Well the one on Mars has a similar tone but it's played with a different instrument. Next time u play Dust Palace and u get to the first room with door u have to unlock, give it a listen. Pretty odd I'm sure a lot of u guys know of these things but let's finally figure out what's behind those vents for once and for all!