I can totally see this has coming from a Mario-ized adaptation of Metal Gear Solid, somehow. Either that, or Bowser inexplicably becoming some sort of super spy. I'm leaning more towards the spy option, myself, since other commenters have made similar observations! xD
This + Giga Bowser fight in an actual Mario game = me stalling just to hear the music. That's right, this music is so good, it surpasses the awesomeness of fighting Giga Bowser (even if only by a small degree).