The pinnacle and prototype of Stoner Noir is The Big Lebowski, whose protagonist "the Dude" seems to have become, in Eldritch's reading, "some kind of modern archetype, comparable in significance to Hamlet."
When I find myself in some weirdly funny situation, deep into some scheme that's hard to say if it's ridiculous or just unconventional, having forgotten the overall point of whatever project I'm pursuing, the question "What am I doing with my life?" might occur to me, or I laugh nervously and point out that the genre of my current narrative is Stoner Noir.