Taking hallucinogenic drugs can be considered "tripping" down the rabbit hole, but it is also explored through philosophical and existential thinking.
The origin of the term is from the rabbit hole in Alice in Wonderland which leads into Wonderland.
- Morpheus, from The Matrix (I couldnt think of anything original, sorry)
Dude B: "That was some badass rabbit hole you fell down"
2) Nonsensical process of getting from Point A to Point B with no clear route (and often no recollection) on how one got there.
2) "Team C started out as a unit designation, but after two years of going down the rabbit hole the C stood for chaos, and Team was just a group of guys who wanted to make it home without a rabbit in their asses at the end of the day"