Manual Drill
While we don’t know exactly why these people are drilling into the ground, we do know that this is really not how a drill is used. Logic suggests that only one person would need to hold the drill and apply a bit of pressure to get the job done. These guys seem to be manually turning the drill together. This is a bad decision that could take the whole day… At least they have earmuffs!
Ghostly Emergency
Unless you have the ability to walk through walls, it might be an idea to memorize the exact position of the door to this room. If an alarm was to go off in the dead of the night, making a terrified dive for the space below one of the bright EXIT signs, and with probably only one eye half-open, will end badly. If you look closely at the two EXIT signs, they both point into the corner.
In fact, before switching lights off to turn in for the night, you might want to be sure that the door in the picture does actually lead to an escape route. At least the designers of this wondrous room had the foresight to place the door-handles at a height that one could reach while racing across the room on all fours!