The climactic battle, especially on Earth. Whatever the faults of the film's writing, Jordan's showdown with Parallax is a thriller with the filmmakers just getting the possibilities with a ring that can create anything. What that enables is a mindblower of an action scene as Jordan creates one green energy construct after another in rapid-fire succession to fight the seemingly unbeatable foe. Finally, Jordan is being pushed to the floor by the entity who is ominously ranting of what failure he is and what is going to happen to everything he values so he might as well despair and surrender to his fear. Against that, Jordan quietly recites his Corps' Badass Creed, now realizing it has come to mean everything he values, until he roars why this worshiper of Evil's might must beware his power, "Green Lantern's Light!"
Parallax: "I feel your fear growing. You will be dead soon."
Hal Jordan: "In brightest day... Ngh... In blackest night..."
Parallax: "And when you're gone I'll destroy everything you ever loved."
Hal Jordan: "No evil... Shall escape my sight..."
Parallax: "Your family, your home, your planet will be no more."
Hal Jordan: "Let those who worship... Evil's might..."
Parallax: "The entire human race will be wiped out, because YOU, Hal Jordan... Were afraid."
Green Lantern: <Turning to look directly at Parallax> "Beware my power... Green Lantern's Light!" BOOM!