In a high school which I never actually went to, but hung out at a lot, a friend of mine did Mexican Wednesdays. He would hang out by the door and when ever someone came out of it he would play on his guitar a little Mexican ditty you often hear in old westerns when the villain enters the screen (if you play guitar, try playing an open E chord, then move it up a fret, so it's like an F without the barre, then back down). That would be my intro music.