On September 11th, 1956, the police were called to break up a crowd of rowdy teenagers following the showing of the film Rock Around The Clock at the Trocadero Cinema in London, England.

The following day, The Times printed a reader’s letter that said: “The hypnotic rhythm and the wild gestures have a maddening effect on a rhythm loving age group and the result of its impact is the relaxing of all self control.” The film was quickly banned in several English cities. (Source: This Day in Music)