Question: At the very end of the scene in which Walter and the Dude are spreading Donnie's ashes at the coast, a dark and unidentifiable figure appears for a few seconds in the upper right screen, apparently hiking a trail along the cliff. Was this an accidental walk-on by an actual hiker, or was it written into the script? With all the star-power in this film, I thought every bit of background action was supposed to be meticulously crafted.
Answer: There's no way of knowing. If the hiker was that far away, it could have been someone who happened to stray into the scene by accident. The filmmakers may or may not have noticed, but if they did, may have felt it added to the realism. I did this myself during the filming of a street scene for the TV show, "Northern Exposure." Filming was underway before I realised I was in the midst of it. I just kept walking like I was supposed to be there.
Question: What role does Paris Themmen play in this movie? (IMDB.com only lists him as "uncredited".).
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.