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When you go to the cinema, you will see a green band. This is different from other movie trailers that may appear on the internet. This green band signifies who the following scenes are appropriate for, when concerning age. Optionally, a red band may be used to signify more mature audiences. Trailers such as the Transformers trailer and Harry Potter and the Order of the Phoenix trailer will have green bands, since they are rather docile. Other R rated movies or unrated movies usually use the red band instead. The guidelines for these bands are governed by the MPAA.