Immortal, The Easter Egg - Tired Game Programmers Need Coffee. Ugh

In stage four fly through the first room on the magic carpet, stop to open the door, and board the carpet again. In the horizontal corridor, fly close to the low wall and eventually you'll find a coffee pot. Move on to stage five. In the room with the red worms, head for the hole in the floor without using the Sensor. At the end of the corridor you climb down into you'll meet the game's programmers. Give them the coffee and they'll give you a spell which will automatically wipe out the two trolls in Stage 6.