A dissociative drug which, once taken, makes a lot of people spout all sorts of pretentious pseudo-intelligent bullshit about the universe and how there's something more, or some such other massive shite.
This constant need for unnecessary musings on things not real undermines the fact that there is actually a beautiful world around us which people have forgotten to appreciate.
Guy on Ketamine: Hey man, have you ever thought there might be something...more...than this?
Other guy on Ket: Yeah man, parallels and shit--
Sober human being: Shut the fuck up