3 questions for...Jakob Lass

I am convinced that an improvised adaptation is the only way to do justice to the novel with all its party scenes. We distilled individual scenes from the book "and turned them into a kind of skeleton book - a very bare, reduced, dramaturgical structure. The actors then improvised freely from the moment, I hardly gave them any dialogue.

Of course, we also had normal filming - but then there were four days of partying with lots of extras. During this time, we tried to subordinate ourselves to the party and somehow integrate our shoot. Of course, we wanted to disrupt the flow of the party as little as possible. We sometimes just sent emojis back and forth on our mobile phones to communicate. (laughs) That was very adventurous. I hope you can tell from the film that it was made a little differently.

I was often in Hamburg when I was 16, as my best friend has an aunt and uncle here - and of course we often went partying. So I gained party experience in Hamburg very early on. There was also a research night before filming where we had a stamp from almost every club in the neighbourhood - both my arms were full. During the day, we then had background discussions with the club owners.