From librarian, to silent particle physicist hitting everything and anything with crowbars. Now that would be interesting to see (related to the description above), those head head crab zombies as ponies the whole lot of 'em.
Rise and shine, Mrs. Freemane. Rise and shine. Not that I wish to imply you have been sleeping on the job. No one is more deserving of a rest. And all the effort in Equestria would have gone to waste until... well, let's just say your hour has come again. The right mare in the wrong place can make all the difference in the world. So, wake up, Mr. Freemane. Wake up and smell the ashes.
Half-Life 3 end scene: Gordon speaks for the first time: "Dear Princess Celestia. Today I learned, that I need to be prepared for unforeseen consequences" then G-man turns into Trollestia and credits roll.