Mistborn/Awesome

Marsh finally throwing off Ruin's influence enough to take the earring out of Vin's ear.
- This is then topped by the ensuing beatdown, including the total flattening of Kedrik Shaw. This is after firing off a Steelpush so powerful that it launches her over the stormclouds to give her an unimpeded view of the night sky.
- To elaborate, Vin fights twelve Inquisitors and kills them all.
In The Well of Ascension, at one point, Vin, a hundred pound 18 or 20 year old girl comes screaming down out of the sky wielding a sword longer than she is and cuts a man and his horse in half.
- Not just a man- Straff Venture, the Big Bad of the book and probably the vilest human character in the whole trilogy, gets sliced in half. With style.
Sazed punching a Koloss in the face. Sazed!
Elend and the atium-burning army out-gambitting Ruin by using the army of koloss as an excuse to use up the entire atium reserve to keep it away from Ruin.
Elend's chapter in The Well of Ascension where he goes, alone, to a koloss camp, bitches at Jastes, walks out and then single-highhandedly attacks and kills a koloss in order to find out how Jastes controls them. All without Allomancy.

The koloss he'd attacked did not rise. Its companions stood, looking unconcerned, though their eyes were focused on him. They seemed to want something.
"He ate my horse," Elend said, saying the first thing that came to his clouded mind.

Kelsier taking on a Steel Inquisitor in a hopeless fight to buy time for the escaping prisoners. He wins.
The Lord Ruler bitch-slapping Kelsier so hard his face is left almost unrecognizable.
Vin figures out how to kill somebody burning atium without having any herself, which was thought to be more or less impossible.
In The Hero of Ages, Vin manages to take out four Inquisitors with only her Mistborn powers before getting overwhelmed.
Vin rushing from the ball to stop Elend's assassination in the first book, taking on two Mistborn and a few other Allomancers at once.
- Doubly awesome when she goes one-on-one with one of the Mistborn Shan Elariel, tricks her into thinking she's run out of atium, then turns it back on at the last second, grabs an arrow and shoves it into her chest.
- All while in nothing but her underwear. She had to rip the ball gown off in order to run.
The culmination of Preservation's entire plan. Preservation, by his nature, could never attack Ruin. But a human can, and Vin does when Elend is killed.

Vin: You created the thing that can kill you, Ruin. And you just made one huge final mistake. You shouldn't have killed Elend. You see, he was the only reason I had left to live.

- Also a moment of awesome for Elend as well. According to Word of Brandon,burning Atium with Duraluminum allows you to see the full consequences of your actions. By doing this just before his fight with Marsh {who Ruin has reclaimed control over}, he realised that by allowing himself to die, he would cause Vin to sacrifice herself to kill Ruin - allowing Sazed to take up both Shards and fix everything. He gave his life to save the world