Few additions
1. Sarah Ulrich and a faulty shower door in Unter Uns
2. Kari Lizer suffers from a prank while cheerleading in Private School
3. Leslie Easterbrook’s water safety lesson in Police Academy: Citizens On Patrol
4. Vickie Benson’s bikini runs afoul of hotel security in Private Resort

In my opinion, Daryl Hannah has an even better ENF scene in "At Play in the Fields of the Lord". Filmed only 4 years after "Roxanne", so Hannah was still in amazing shape. In that movie, she is sitting against a tree, sunbathing completely nude. And Tom Berenger wanders up to her, startling her. Then, she runs away. Full frontal (and dorsal nudity). Fleeting, but fantastic.

I've always been a little disappointed with the Kirsten Dunst ENF nightmare in Bring It On. Sure, she has maybe the greatest ENF reaction when she realizes she is cheerleading naked in front of the entire school assembly, but I've been disappointed that we didn't actually get to see what her naked breasts and vulva looked like before she covered her naked body with her pom-poms.

Honestly, it's a little disappointing that there aren't more ENF/EUF humiliating scenes like this in movie history. It really is one of my all-time favorite EUF scenes. As I've said countless times before, the only way this scene could be better is if baby Buddy actually takes off Julia Schultz's bra and forces her to bare her nude breasts while he's busy ripping open her shirt.

That definitely is a great scene. You're right in that there aren't enough enf/euf scenes in movies. I guess there isn't a huge market for it, so they're usually quick too. This one is great like you said because of her reaction. First she covers up, looks flabbergasted, then that awkward smile at the end trying to brush off the exposure. Great stuff.

EUF Who's minding the store?
 

One of my favourites in the Jerry Lewis movie featuring a voluptous Francesca Bellini who's skirt is swallowed by a vacuum cleaner in a store esposing here nude shiny stockings and black garters, at 5:50. Here reaction is gorgeous!
EMBARRASSED!!!
youtu-be.com/watch?v=I7-pLsoY8IQ&list=PL1Hsk9MmnxmTJbQPCOzyYm-d3_5ftkxFs&index=5&t=0s

In this clip the beautiful actress is seen in different attires typical of the 60s, tight pencil skirts, blouses... high heels, and of course nude stockings

Also don't forget:

Sue Ann Langdon-- from the 1966 film "A Fine Madness" starring Sean Connery. Perhaps the greatest EUF/ENF scene that takes place at work.

"Loose Screws" AKA "Screwballs 2" the sequel to famous 80's Canadian film. There are several scenes here. The guys pretend to be doctors conducting exams on the female students--one girl ends up running around the halls in her panties with no bra carrying a skeleton for cover. However, it's the end scene that takes the cake--Cynthia Belliveau plays a stuck up French teacher that's enticed by "screw fumes" to do a striptease at an assembly at the end of the film. Memorable and humiliating.

Finally honorable mention has to go to the opening of 976-Evil 2 where a young woman is chased around an empty school at night in her undies before being killed...just what the girl is doing by herself in a closed and locked school after hours is never really explained, but who cares? Not a strictly "EUF" scene-- more in line with horror like the famous "Halloween" stuck in the window scene...

Karen Gillan
 

Karen Gillan (Doctor Who, Avengers) - ENF scene from the movie Not Another Happy Ending

movie zotz
 

going way back movie ZOTZ . TOM POSTEN AND JULIA MEADE. Fumnny old move.. but the hot spot is at 10:45. pretty tame today but in 63 it was alot...

video here youtube.com/watch?v=Dz-uoWm06XA

i remember the first time i saw it i thought they were going to hide all the nudity behind objects...............i was so happy when she ran and her cute little butt was showing..........