A 90s video I happened to find regarding the dialect "Museop-no"

Around the 38-second mark,
when the otter doesn't open its eyes,
an employee says, "Nun-eul an tteu-no" (Why won't its eyes open).
The subtitles on the screen say "Wa nun-eul an tteu-no" (Why won't its eyes open),
but the actual audio is just "Nun-eul an tteu-no."
I've written a few posts before about how "no" is used
as a type of exclamation or monologue,
omitting the interrogative word.
This is exactly that kind of situation.
It's the same vibe as "Museop-no" (How scary).
I happened to find this on YouTube.
For your information, those people are civil servants, not police officers.