so why don't you do something about it? if this guy's not only being rude, but wasting class time that you are paying out the ass for, pull him aside outside of class and let him know that the teacher has office hours? last semester's gunner hasn't spoken this semester, so it obviously works with some people.
i don't mind the gunners that much, because at least they're keeping me from getting called on, but i do get pissed when it sounds like someone is talking in class just because they like the sound of their own voice, or want people to think they know more. what really bothers me is when someone gets called on, takes a second to either think or flip a few pages to figure out the answer, and a dozen hands shoot up around the room. let people work the answer out, and let the teacher go where he wants with the discussion. quit wasting my time and money. if you know the answer, congratulations, you don't need to talk. class discussion is for people who are trying to figure out what's going on, not for people who want to show off for the teacher. anonymous grading, assholes.