Ilinx

Ilinx is a kind of play, described by sociologist Roger Caillois, a major figure in game studies. Ilinx creates a temporary disruption of perception, as with vertigo, dizziness, or disorienting changes in direction of movement.
Caillois identified several categories of play in "Les Jeux et Les Hommes" (; 1958, in English as "Man, Play and Games" ; 2001.) In the book, Caillois described the category of ilinx as games that:
Caillois's other categories, which should be considered alongside ilinx as any form of play rarely fits wholly and discretely into one category, are "agon", "alea" and "mimesis" (or "mimicry").