The film turned with the emulsion the wrong way. With color film the outcome is this:
http://www.flickr.com/photos/fionao/sets/72157606410832020/with/3244849789/

Howto:
http://www.flickr.com/photos/raypg/4203987853/

Faking it:
http://blog.metrix-x.com/2009/08/faux-redshift.html

Probably not as visible with B&W film.

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