Stress and anxiety while watching ?

I was very distressed while watching this, chewed my nails to the bone.

I had the same experience with the movie and I'm also used to watching many kinds of genres without a problem.

I think this one really got to me partly because of the one take shooting which made it feel as a journey that I the viewer was on alongside them. The actors generally felt very real, especially Victoria and Sonne. I bought them and their budding relationship.
I probably also identified with the Berlin nightlife part, in the beginning of the movie, as it reminded me of my own experiences of going out and drinking with friends, here in Denmark.

And furthermore the fact that I didn't know much about the story was probably something that helped. From the beginning of the club scene I got tense and scarred for what could happen to this girl, but was delightfully surprised with the unexpected plot beats that came along. :)

I'm with you too - I had to take breaks! glad it's over haha!

YES!!! My God what a f£$king intense film! Amazing! Forgive the hyperbole but I'm still kind of tense now, 10 minutes after watching. Phew! What an immersive experience, kudos to all involved, what a film! And it's made me want to visit Berlin even more (a place I've always wanted to see)...9/10 for me, absolutely brilliant.

"Hot lesbian witches!"

Yeah me too. Right from the beginning. I felt very protective of Victoria and I was suspicious of these guys from the beginning. Early I thought that they were gonna rape her or something. There was never a sense of feeling that she was safe and I just expected that she would end up dying. I had to take a glass of Whiskey after the end of the movie. 

Yeah, there's always this tension because you don't really know what it's building up to.

--It's funny but I visited Berlin two weeks ago and I think they got the nightlife crazy atmosphere pretty dead on.--

The characters as well. Except of the ending this is a very accurate portrayal of people in Berlin (of course not everyone is like that, but every Berliner knows such guys, and there are also a lot of young people from Spain because of the economic situation in their country, so this is all spot on).

Yes, I was a bit stressed out watching it because I kept on thinking 'oh no! What is this stupid naive girl doing?'. lol