It’s a university student thing in Sweden, yeah… dubbed the “scream of angst” in some parts, even done at particular times (“the four pm scream”) etc. There may be some vague idea that it is about exam-studying angst especially, but the actual factuality of that might be somewhat dubious.
I guess Swedish uni students may not be the only ones that like goofing off, but perhaps they enjoy it a bit more than most…
