You might assume that the worst thing that could happen when you go to see Frozen 2 would be a kid accidentally spilling a coke over you or maybe a baby crying their way right through the movie. Well, attendees at a screening at the Star City cinema in Birmingham, UK found themselves caught up in what police are describing as a "mass brawl" that "bears the hallmarks of an organized fight between rival groups." This involved around 100 teenagers, two of whom were armed with a machete and one with a knife, fighting with one another.