What if there were a parallel universe where Doom II's secret levels were a joke based (mainly) around Commander Keen instead of Wolfenstein 3D? Doom 2 The Way Id Did (D2TWID) brilliantly explores this concept.
Recorded with Chocolate Doom.
Intermission text before the level starts:
AS YOU DIVE INTO THE WELL, A MADDENING PHRASE ECHOES IN YOUR HEAD.