My definition of fan film is simple: it's a film made without copyright authorization or a film made in tribute to a film or franchise. For example, J.J.Abrams's two "Star Trek" movies are "Star Wars" fan films. I could give many details, but to give just one example, the level on which the cities were based on Star Wars cities boggled my mind. Yes, it was made by professionals. It had pro actors and CGI people who were paid. It had a ginormous budget. Heck, it even pretended to be part of another franchise. But for me, it was a big budget Star Wars fan film. The Clone Wars Strike Back!