Henrietta's shootout with the FN Herstal P90 from Episode 1, which showcases just what the Cyborgs can do.
Triela's fight with Pinocchio. Its a Crowning Moment of Awesome for both characters. Pinocchio manages to match Triela until the very end, and Triela manages to defeat Pinocchio despite him being a Badass Normal.
Petrushka and Sandro disarming the nuke and defeating Giacomo's assistant. Sandro manages to talk him down and show off his deduction abilities to the fullest, while Petrushka manages to defeat both the assistant and his guard non-lethally.