parts of the film but in abbreviated form and usually without producing spoilers. For this purpose the scenes are not necessarily in the order in which they appear in the film. A trailer has to achieve that in less than 2 minutes and 30 seconds, the maximum length allowed by the MPA. Each studio or distributor is allowed to exceed this time limit once a year, if they feel it is necessary for a particular film. In January 2014, the movie theater trade group National Association of Theatre Owners issued an industry guideline asking that film distributors supply trailers that run no longer than two minutes, which is 30 seconds shorter than the prior norm. The guideline is not mandatory, and also allows for limited exceptions of a select few movies having longer trailers. Film distributors reacted coolly to the announcement. There had been no visible disputes on trailer running time prior to the guideline, which surprised many. Some trailers use "special shoot" footage, which is material that has been created specifically for advertising purposes and does not appear in the actual film. The most notable film to use this technique was Terminator 2: Judgment Day, whose trailer featured an elaborate special effect scene of a T-800 Terminator being assembled in a factory that was never intended to be in the film itself. Dimension Films also shot extra scenes for their 2006 horror remake, Black Christmas - these scenes were used in promotional footage for the film, but are similarly absent from the theatrical release. A trailer for the 2002 blockbuster Spider-Man had an entire action sequence especially constructed that involved escaping bank robbers in a helicopter getting caught in a giant web between the World Trade Center's two towers. However, after the September 11 attacks the studio pulled it from theaters. One of the most famous "special shoot" trailers is that used for the 1960s thriller Psycho, which featured director Alfred Hitchcock giving viewers a guided tour of the Bates Motel, eventually arriving at the infamous shower. At this point, the soft-spoken Hitchcock suddenly throws the shower curtain back to reveal Vera Miles with a blood-curdling scream. As the trailer, in fact, was made after completion of the film when Janet Leigh was no longer available for filming, Hitchcock had Miles don a blonde wig for the fleeting sequence. Since the title, "Psycho", instantly covers most of the screen,