Index's escape. She deliberately flings herself from a car, enabling her to use magic. She then jury-rigs a church to prevent tracking spells from finding her. And finally, she puts herself in harm's way again just to allow her to use an invisibility spell.
Chapter 5. Kuroko's Curb-Stomp Battle against one of the one of the bombers, later followed by Mikoto riding an Electric Slide to catch up to the bombers' getaway car and disabling it with one shot.
And then she follows it up against Saten's friends, who've all taken Level Plus and are itching for a fight, efficiently, quickly and non-lethally subduing and restraining them.
Chapter 9. Touma outwitting Stephen by tricking him into pulling out a gun...while a security robot was watching.