At roughly 4:30 AM, local time, all hell broke loose. It started with a light rumble, as if from outside, that slowly grew louder. the lighter sleepers would notice this, but any deep sleepers would never know it had preceded what came next.
It was only Flash Bangs, at first, but it was a lot of Flash Bangs. they appeared to be raining from the ceiling, going off everywhere, creating a huge screen of smoke and blinding those unlucky enough to open their eyes. Next, gravity turned off and anything that wasn't bolted down began floating around the room,beginning to spin, bunks, recruits, footlockers, all banging into each other, bouncing off walls and creating a horrible ruckus. Third, through the hazy smoke came a hail of small objects, rocks, marbles, chunks of rubber, trash, all flinging about the room. Finally, Gravity returned, dumping the contents of the room back on the ground in a disorderly fashion.
This completed, a lazy male voice called out over the loudspeaker "You have five minutes to be on parade rest in the courtyard. No one leaves the room till it's spotless. Good day."