What Anime Fight Actually Gave You Goosebumps?

What are the anime fights that actually gave you goosebumps?

Not just good animation, but fights that made you sit up and think "damn... this is insane."

I recently made a list of my Top 10 Anime Fights That Gave Fans Goosebumps, and while editing it I realized how many legendary fights there actually are.

Now I'm curious-what fights would definitely make your list?