The scene during the twelfth episode of, the hopefully first season of, Scavengers Reign.
It was an absolutely amazing scene to watch, where it felt like I was seeing the truth of the universe unfold before my eyes. Amazing animation, amazing sound design and music, amazing cinematography? Man, I dunno, the whole show was amazing.
I rewatched it 45 times before I decided to download some video editing software, just so I could upload this specific scene to YouTube.

(I do not own the rights to Scavengers Reign)