Cartman saving Terrance and Phillip by turning off the electric chair's switch and then causing a power surge with his swearing.
The fact La Résistance had the balls to go into the battlefeild, full of people dying around them, where they could easily get caught in the crossfire (Stan even nearly got hit by a rocket), just to save Terrence and Phillip. That takes courage for an eight year old.
Kyle (stands between the soldiers and Terrence and Phillip) I'm not going to let you kill them mom!
Shelia: WHAT WHAT WHAT!!?
Kyle: I'm. Not. Moving.
And Kyle knew full well that he was slowly pressing her Berserk Button hard enough to break the console. He knows he might get killed or otherwise have something horrible happen to him for talking back to her, and that takes guts.