What's Your Entrance Music?

This is a point of discussion every baseball season or whenever I watch Major League. When pitchers (and some batters, I believe) step up to the mound or plate, they have entrance music. If I knew enough about sports, I'd give you an example. However, the only example I can think of right now comes from the movies.

If you were to have your own entrance music when you, say, entered a room, what would your song be?
If you have not seen Major League, the clip of Ricky Vaughn advancing to the mount is below (warning: language is definitely R-rated which is funny for me, but it may not be funny if you have little ears nearby or if you have extra-sensitive ears):

I haven't decided my theme song yet. I sometimes think it's Whatever by Godsmack or Headstrong by Trapt. I'm trying to think of a less, um, angry song, but those songs just get me fired up every time. (Also do not click on the links to the songs if you, or people around you, have sensitive ears.)