You know how you can really annoy a trekkie fan when you're watching Star Trek? Suddenly point at the screen and shout "Hey, isn't that Captain Jon Luc Skywalker?!" You can actually see them wince as the mix up causes them physical pain. You then wait till they've spent ten minutes explaining to you (in minute detail) the difference between Star Wars and Star Trek, pretend to think deeply for a minute, and say: "but he is a Jedi, right?" This can cause instant cardiac arrest in some of the more hardcore Trekkie fans.