The moment in Chapter 21 where Satellizer and Lana turn around theNo-Holds-Barred Beatdown Arnette and Creo have been giving them. Satellizer does it via her crazy Determinator status allowing her to push herself to the edge of Novalizing (and to curbstomp Arnette while unconscious), and Lana does it by deciding to stop holding back. Particularly cool is the bit where Lana leans in close to a clearly shocked Creo.
Freezing First Chronicle, Chapter 3: This page marks the beginning of Chiffon Fairchild's utter annihilation of 36 pandoras in the 2nd Carnival. Note: Next few pages after the example are NSFW.
Everyone keeps saying that Aoi Kazuha was the most Badass Pandora user ever. She proves itBIG TIME.
In chapter 85 Kazuya risks his own life and sanity to save Rana and Satellizer after they have been corrupted into humanoid Novas, and succeeds. Some of the awesome is lost since he nearly succumbs to his own trauma and needs Rana's help, but the thought still counts. The guy was willing to risk Mind Rape to save his comrades. Another more experienced Limiter admits that Kazuya's abilities as a Limiter dwarf his own.