At its heart, Attack On Titan is incredibly unsettling. I mean, it's about giant humanoids eating humans for seemingly no reason whatsoever; of course it's unnerving. So you look at this animation by riseken—which recreates some of the early plot of Attack on Titan—and you're just like, wow, it should be wrong to have the whole thing be chibified.
Except, chances are, if you're a fan of the anime/manga, you'll probably like this anyway—even though it's entirely in Japanese. Still, sorry if this is incomprehensible, folks who have never delved into Attack On Titan before. (You should watch it!)