Why are some people saying extreme Metal and ballet fit?

[LivingCadaver]

Arsis wrote the song a diamond for disease for a ballet...

 

[Alteredmindeath]

This would fit great with emo.

 

[Carcassian]

Actually, dancers seem to fit most music. Just put on a typical MTV pop dance type track, turn down the volume and slam on some extreme metal..see ?

(Note: Ultra Slow Doom or Ultra Fast Grind may not work).

 

[Neurotic]

I think There's a peccatum video with something like that, dancing and shit, it was sometime ago i saw it, it's from the last ep, did not like the video at all lol