Jason's Ultimatum said:It was weird how the Scarecrow was like something thrown in at the last minute. I really didn't see a point for him to have a couple of minutes scene and that was that.
http://en.wikipedia.org/wiki/Cameo_appearance
A cameo role or cameo appearance (often shortened to just cameo) is a brief appearance of a known person in a work of the performing arts, such as plays, films, video games[1] and television. These roles are generally small, many of them non-speaking ones, and are commonly either appearances in a work in which they hold some special significance (such as actors from an original movie appearing in its remake), or renowned people making uncredited appearances.