In "Puppet Bride" Ms. Wakeman standing up to Little Acorn after being antagonized by him for so long.
In the first episode, Jenny obliterating an asteroid that was heading towards Earth.
In the movie, Ms. Wakeman fighting Vexus.
Let's face the fact that anytime Vexus shows up, somebody is gonna open up a can of whoop-ass.
All the times that Jenny's prototype sisters get their act together and fight the enemy as a team.
In his debut episode, Sheldon rescuing Jenny, even after she said that she didn't like him.
The orchestral remix of the theme song in "Escape from Cluster Prime."
Brad is pretty awesome in "Teen Team Time". During a fight with a giant frog monster, he blinds it with huge lamps, goads it into attacking him with its tongue, backflips off said lamps and watches the frog electrocute himself when XJ-9 and one of said Teen Team members couldn't do a damn thing.
In "Return of the Raggedy Android", after getting kicked out of a high-end diner for being a robot, Jenny tries on the more advanced exo-skin, which not only gives her a more feminine appearance, but has sentience, and convinces her to act like a "normal girl", convincing her not to step in when the Space Bikers attack. But when the Space Bikers attack Brad, she destroys it, and saves everybody else. The Jerkass owner ungratefully throws her out after saving his life, but Brad, and everyone else leave in disgust, showing that people do appreciate Jenny's heroics.
Nora using a bunch of fire extinguishers to freeze a gelatin monster.