...and somtimes you can tell from a trailer whether the movie will rock or suck.
Er, no, most of the time you can't
tell anything about a movie from its trailer, because the trailer usually takes scenes completely out of context, or there will be scenes in the trailer that aren't actually in the movie.
cheesy dialogue ,horrible acting, bad visual effects.
SW:Episode 1 and batman and robin had all these in their tailers.
however I said somtimes.