I think the contents of that box consist of all the emotions of whoever did the WAV recording for the default "Check 6" call.
I wonder if they realize thats where they are at?
Nate, Super, HT, Pyro....you all heard anyone walking around the building with a dull, glazed over look chanting, "Check 6...Check 6...Check 6"?
Might wanna give them back their personality!
J/K!!!!
-Ding