Twilight, Rainbow and Pinkie fighting an attacking Sea Serpent in chapter 9.
Apple Bloom managing to catch the spirit in The Apple and the Fox, which also gained her a cutie mark.
When you think about it, Velvet Sparkle's life is a Moment of Awesome due to spending her youth growing up and living with the Halla, being a mother of a half-Halla who is also a legendary White Hind, a prince of the Crystal Empire and she was also a foster-mother of an Alicorn of the Stars.
