* Every nation on Earth banding together and unanimously declaring war upon Equestria and Celestia, particularly if you've read other TCB stories where it essentially seemed like the humans were complacently letting the ponies take over Earth and wipe them all out, all the while the ponies are being painted as the good guys.
** The RousingSpeech given by UN diplomat Ellen Rowe. It successfully convinces humanity to put their differences aside to defeat this alien enemy.
* When the barrier finally goes down after sustained bombardment.
* "The Longest Day" confirms that humanity reclaimed South Africa and are on their way to winning the war.
* For those who read so many other TCB fanfics where Celestia has the moral right, and no matter what the humans do, the ponies are superior, it was very, very, ''very'' satisfying to see Celestia run like hell when the united forces of humanity came bearing down on her nation.
* In "Aftermath: Part II", Celestia ''finally'' gets a WhatTheHellHero lecture from Queen Molyneux of Gryphus, calling her out for her AssimilationPlot. What's more, it's made '''very''' clear that now that the griffons -- and soon, the rest of the world -- know what she's capable of, her OmniscientMoralityLicense is as good as gone and she ''will'' answer for her crimes.