It was 1976 and I was part of a group of teenage girls who'd won a week's work experience at a radio station. It looked familiar and I decided it must be a remake of a movie I'd seen. The DJ was a very dodgy, corrupt type and I knew all the girls in the group were going to die (horribly) and I was determined not to be one of the casualties.
While we were waiting for the doors of the station to open I looked around and saw a screen showing part of an Australian sitcom from the 80s. "Hey, that can't be right!" I said. The other girls ignored me. I heard someone laughing on my other side and saw one of my ex-flatmates. He gave me some kind of explanation but I couldn't understand any of it.
Next it was much further into the movie and the girls were in the DJ's house where an orgy/drug party was going on. I was pleading with them not to go up the stairs but they wouldn't listen to me. Finally I was the only one left and when I went up into the bedroom they were all dead and on the TV I could see friends of the DJ's walking around in the garden complaining about how the girls had drunk all their expensive wine and replaced it with cheap cask stuff.