Whats That Song Dun Dun Dun Dun What Is The Song That Goes Dun Dun Dun Dun?

What is the song that goes Dun Dun Dun Dun? - whats that song dun dun dun dun

The song goes Dun Dun Dun Dun, and it sounds like a tuba as the bass instrument, or is low. It's like a rap song and popular intro scenes for movies / etc