Avra, the first Lantern, decides he's had enough of this "losing" crap and plans to show his fellow recruits just what the power of will can really do. Cue Curb-Stomp Battle from the very first constructs made by a Green Lantern Ring.
Sergeant Deegan's Last Stand. His defensive shield gets fried by a Wave Motion Gun, and for a brief and terrifying moment it looks like he's going to be vaporized...until his eyes turn green. With the last of his energy, he forms another construct — a drill — and pushes it through the beam and crashes into the tank firing, blowing it up from the inside. He dies shortly after, but he absolutely demonstrated the true power of a Green Lantern's will.
The climatic scene when the Corps desperately pushing the planet Oa against Krona with every once of willpower they have, but he is too strong and they are taking casualties. Just when Kilowog notes that they need more power, Green Lantern Mogo, the living planet, arrives to help and Krona learns the hard way how much to beware the Corps' power!
In other words, a planet uses another planet to hurl a planet-sized villain into the sun. If that is not awesome, nothing is.