The Mistake Room's current show, an installation by New York–based Korakrit Arunanondchai, is a timed experience — it takes about 20 minutes from start to finish. When you arrive, you're led into a viewing room, where you watch a film in which the artist, played by the performer Boychild, explains that he used to cover himself in paint but now he's clean. Then an attendant wearing all white leads you into the next room, where an army of white-clad mannequins flank a fountain with a bar of soap, held by a floating hand and lit from above, at its center. Then you watch another film detailing the artist's journey, which seems to have happened in about two days, from dirty, self-obsessed, drugged-out expressive painter to clean ascetic. That it's a mash-up of different genres and sensibilities (abstract expressionism, New Age, sci-fi, music videos, slacker art and hi-fi) and that it's half spoof and half serious makes it worth thinking about. 1811 E. 20th St., dwntwn.; through Sept. 13. (213) 749-1200, tmr.la.