RDJ FILMS THAT YOU MAY OR MAY NOT HAVE SEEN: Two Tons of Turquoise to Taos Tonight (1975).
also known as: Moment to Moment. Throughout its one-hour running time you see him pop up here and there, usually on the screen between 2-5 seconds. It’s a showcase for his mom, Elsie Downey, who plays all of the female parts in this experimental film that makes absolutely no sense (but I think that’s the point; the scenes are literally from “moment to moment”)
You see the entire Downey family here — mom, dad, sister Allyson, Robert (credited as “R.J. Downey”). The scenes (if you can even call them that) with RDJ almost feel like they were taken from private home videos.