The clip above comes from Frederick Wiseman's brilliant documentary The Store, which chronicles the 1982 Christmas season at the Dallas Neiman Marcus store and corporate headquarters. Everyone in it is either insane or wearing something completely ridiculous or trying to buy something completely ridiculous or devious about getting their mitts on other people's money (sometimes, all four categories apply to a single person). Wiseman makes really still documenatries that are more impressionistic scene collages about a given subject (the zoo, public housing, high school, Aspen, etc.) than they are definitive narrative accounts (there is an utter lack of voice-overs and expository interviews). Sometimes, this makes his movies feel a little boring or slow, but The Store is full of so many weirdos that it's never less than fascinating. It's two hours of joy. My favorite part of the clip above (two minutes of two hours of joy) is the old ladies smiling repeatedly as their souls frown definitively.
Also, this Daily Beast piece has another great clip from The Store -- an employee receives a particularly naughty birthday greeting from a dude in a chicken suit who goes on and on and on. Amazing.