Science fiction fandom other groups including LGBT communities, libertarians, neo-pagans, and space activist groups like the L5 Society, among many others. Some groups exist almost entirely within fandom but are distinct and cohesive subcultures in their own rights, such as filkers, costumers, and convention runners (sometimes called "SMOFs"). Fandom encompasses subsets of fans that are principally interested in a single writer or subgenre, such as Tolkien fandom, and ("Trekkies"). Even short-lived television series may have dedicated followings, such as the fans of Joss Whedon's "Firefly" television series and movie "Serenity", known as Browncoats. Participation in science fiction fandom often overlaps with other similar
Joss Whedon digging with a scalpel to cause pain. He said of the film's characters, "Strong but damaged by power describes every person in this movie. It may, in fact, describe what the movie is about ... the more power that we have, the less human we are". Whedon discerns that "Age of Ultron" "is an odd film" that proved challenging when it came to finding the rhythm between both its calm and exciting moments. Drawing parallels to a symphony, he wanted to bring about "grace in the middle of ultimate chaos". Whedon also served as a creative consultant on the films