What is your favorite fight scene, anime or otherwise? Try to format your answer so that we can understand which series and where to look for it. I look forward to your responses!

Since I'm indecisive, I'll give y'all a list; in no particular order:
Naruto: Shippuden's Pain vs. Naruto, episodes 163-167.
Beast Wars: Transformers - just about any "fight" involving Waspinator.
Avatar: The Last Airbender's Firelord Ozai vs. Avatar Aang, episodes 58-61.
Fullmetal Alchemist Brotherhood's Mustang vs. Envy, episodes 53-54
Fullmetal Alchemist Brotherhood's Father vs. everyone, episodes 59-63
Trigun's Vash vs. Knives, episode 26
Soul Eater's Asura vs. Death the Kid and Blackstar, episodes 50-51