Best boss battle music

[poopmcfarts]

What do you guys think is the best boss battle music ever?

This is my pick.

http://www.youtube.com/watch?v=wXLQHs89c-U

[Freaki-boy92]

Dancing mad from Final Fantasy 6

this was the final boss battle music, and it's super long- it lasts over quarter of an hour and has 4 acts.

it's also amazing.

[LittleWashu]

I will not let you destroy Sparta!

[Banana]

I'm not sure if this is actually a boss battle theme, but it is a battle theme so I'm gonna go with:

http://www.youtube.com/watch?v=20p-ORN4NSY

It plays in the battle arena at the Golden Saucer area in Final Fantasy VII.