In the first episode, Oland under the influence of the blue lantern, punches through the (generally armored glass) viewslit of a tank with his 13mm gun and shoots the driver in the head.
Alice getting in a knife fight, machete versus main-gauche, in heels and a ballgown.
During the Karussel arc, Alice and another officer, having discovered the local conspiracy, are captured by the corrupt militia, whose leader wish them killed via waterboarding. After ten minutes of torture, she notices there's only one guard left near the other officer because every one is sadistically watching her die. She takes out her hidden dagger, jump-kick out of the water and cut two guards with her hands still bound, cut her ropes holding the knife in her teeth and completely destroys five opponents with swords and guns, all by herself. Uber Badass.