Thread:Deathstalker666/@comment-1915529-20120712125232/@comment-1496755-20120821140331

Heh heh, it has happened to me too - some CD was forgotten in the drive and then Quake starts playing some strange music in background :P

While most levels use black boxes, I think there is an exception - The Edge of Oblivion spawns some of the monsters directly, I think. The total number of monsters increases as the level progresses - this wouldn't happen if they were hiding in black boxes.