As presented here, this cue from “Down the Rabbit Hole” proceeds in an orderly fashion from start to finish. The in-game experience is quite different. The anonymous adventurer has slipped down a ladder into a seemingly eternal rabbit hole. As she learns to slow her descent, the frenetic music gradually becomes sparser and more gentle.
To create a sense of “falling forever”, I had the music descend down the symmetrical whole tone scale, which, conveniently enough, finishes up exactly where it starts.
If you’d like to see/hear this sequence in context, check out this YouTube video. The music’s pretty soft so you may need to crank the volume.
Or just listen to the music as usual:
YouTube: (no subscription required)