Trivia: Woo and the other guy who work for Jackie Treehorn trade outfits when they come back to tell the Dude that Jackie Treehorn wants to see the deadbeat Lebowski. (00:03:50 - 01:13:50)
Trivia: In the "dream sequence", after Maude had her assistant knock out the Dude to steal back the rug, there's a scene shot from inside a rolling bowling ball, which reveals that Maude threw that ball. Use frame-by-frame and you'll recognize the hairdo, the green gown and the high boot.
Trivia: The couch and armchairs in Maude's Studio are by LeCorbusier, a historical person who to this day is held in contempt by critics due to his ties to fascism and anti-Semitism.
Answer: Themmen plays a background bowler in pretty much all of the bowling scenes. I don't know if this is necessarily worth a credit, but I guess his agent disagrees with me.