It's also one of the few times that Nathan Explosion is seen without a scowl, as he, Pickles, and Murderface are all shocked when Toki matches Skwisgaar's playing.
Even better is that Toki's guitar was obviously being held together with tape, making his accomplishment that much better.
Pickles, Skwisgaar, Murderface, and Nathan charging back into the building to save Toki, despite initially trying to escape. Cue Morte Lumina and a badass montage of the band charging through hordes of the Metal Masked Man's army, rescuing Toki, and tapping into some sort of mystical power to defeat the Masked Man.
. Also counts as one In-Universe, since Skwisgaar was grateful enough to Toki for pushing him to the next level that he wanted him in the band, despite having been The Prima Donna prior to this.