Xena: Warrior Princess/Awesome

The scene from "The Reckoning" in which Xena, encouraged by Ares, summons a sudden burst of strength, snapping the chains which hold her prisoner and kicking down the door of her cell.
Gabrielle beating the living shit out of several mooks in a rage during "The Greater Good".
Callisto has a few good ones.
- Her introduction during the teaser for 'Callisto'.

Callisto: I'm Xena. Warrior Princess.

- Catching Xena's chakram in 'Callisto' was also pretty amazing.

Callisto: You want it? Come and get it.

Gabrielle blocking an arrow with her staff in 'Death Mask', before Xena even got a chance to catch it.
Xena + The Power of Rock = SOMETHING BEYOND AWESOME.
- Not that Gabrielle's go-go girl outfit in that episode wasn't already spectacular.
Xena's mother telling off Athena, then leading the rest of the village in a song to drive her away in "Amphipolis Under Siege"
Daphne, a little girl possessed by Xena's spirit, doing a back flip and stopping a runaway horse in "Little Problems".
Gabrielle Shaming the Mob in "Amphipolis Under Siege".

If there's anyone else among you who wants to give up their own child, speak up now because I will not have you fight next to me.

Hercules killing Zeus, and Zeus killing Hera in 'God Fearing Child'.
Xena killing Athena in Motherhood.
- And their dialogue before hand. Particularily calm-cool-and-collected Athena losing it.

Xena: Goddes of wisdom, you got two choices- either you heal my friends, and I leave you in peace- or you die now.
Athena: I WILL NOT BE DICTATED TO BY A MORTAL!!

Xena killing Yodoshi in the finale.
- Also Gabrielle's ladder trick, which puts out a massive fire consuming the Japanese town of Higuchi, saving thousands of lives.
- Gabrielle pulling off Xena's super flip was also pretty awesome.
- Also in the finale, Gabrielle catching the Chakram for the first time.
- And Gabrielle retrieving Xena's ashes from the birds nest via awesome-warrior-hackeysack skills.
  - Despite the fans awe inspiring (and almost universal) hatred of the finale, the whole two part episode was practically made of these.
And how about Joxer in For Him The Bell Tolls"? Kicking off with his sudden Ali-shuffle before beating the crap out of several Mooks, his general awesomeness under the Bell's spell for most of the episode, then Xena's gentle advice to him as he sits despondent that the Bell merely brought out the genuine heroism inside him...followed by his sprightly bouncing to his feet and introducing us all to the ever-epic "Joxer The Mighty"...
"The Quest". Gabrielle looks like she's gonna hand over the Amazon Queen's Mask to Valeska, then pulls back and puts it on herself. Gabrielle - one, Valeska - OWNED.
Ephiny's Last Stand. Amarice might be obnoxious, arrogant, and disobedient, and Ephiny might not even like her--but she's one of her warriors, and Ephiny is not going to stand by and let her be killed because she she picked the wrong fight.
- Ephiny's everything.