Final Doom Easter Egg - Nine Inch Nails II

In TNT: Evilution, Map 17- Processing Area, there is a secret and inaccessable room just to the west of the blue key room. It is used for holding Demons for teleportation into the level, however if you type the noclip code and walk into this area you will find the words "TOM" and "NIN" flashing blue in two opposing walls. "NIN" is a second DooM reference to the band Nine Inch Nails, and "TOM" refers to Tom Mustaine, the designer of this level!