Awesome / The Pandora Incident

• The entirety of the final battle. The Na'vi actually make the Imperials fight hard - though in their defense the Imperials were critically outnumbered and their ships were low on ammo so direct orbital support was a last resort - but even before Eywa turns against the Humans, the Imperial Guard had already slaughtered the attackers at their base camp through divide-and-conquer tactics. And when the wildlife tried to storm the exhausted Guardsmen...well, there's a reason it's called last resort.
• The Space Marines assaulting the Tree of Souls easily tear through the Na'vi, but the wildlife's ferocity and sheer numbers prove enough to all but stop them. Until the Space Marine Captain plants a teleport homer and deploys Terminators who simultaneously butcher the wildlife and kill the Tree of Souls.