Maybe not as action packed as you had in mind, but yeah. Deep, deep satisfaction.

Best fuck yeah moment of all time. Period.

Buffy diving into the portal at the end of season 5 to stop Glory.

The Time Lord Victorious, from The Waters of Mars. The Doctor dares to violate his own principles not to intervene with a fixed point in time. It's a badass moment; but probably an unusual one. You cheer him on; you want him to win, even though you know what he's doing is wrong.

Hallucinating and hanging for his life on a zeppelin, Bruce still works up the nerve to shout out into the night "... I ... am ... BATMAN!"

I don't know if it's the biggest. But it might be the first time I jumped out of my seat at a theater.

Spoiler Alert: Ending of a 8 year old movie.

Cap's Civil War speech!

Cap packs a wallop.

USA! USA! USA!

I mean, we all cheered for this, right?

'It's the Enterprise!'

Ska-friggin-doosh. Seriously, this speaks for itself...

I took my dad to see The Avengers. When this scene happened, he literally stood up out of his seat and said YEAAAAAHH!!! and clapped.

"Well, personally, I kinda wanna slay the dragon. Let's go to work."

Infinity, when Thor goes to negotiate and is forced to throw Mjolnir away before entering negotiations. He throws it around the sun, it circles back and well, it doesn't end well for the Builder.

This what came to mind for me. Death Proof.

"You're all clear, kid, now let's blow this thing and get outta here!"

This: