Here is another story the 3SGs told us. At night, about 2300 hrs onwards, they used to look over from their bunk which is directly opposite that accomodation block to check on us trainees to see if we sleep or not yet. We stayed at the 5th floor and sometimes, they saw lights being switched on, on the 6th floor. The problem is, they said that the previous batch was arrowed to remove all the lights and there was absolutely no one staying there at that time as it was all boarded up and out of bounds.
I dunno how far is it true as they might be trying to scare us. The 3SGs also said that their block also can see 'faces'.