Yeah, its rare for One Piece to feel atmospheric.
Kawamatsu's big scene this animated Katsumi Ishizuka.
In anticipation for Ishizuka big scene on this episode, the One Piece OP twitter retweeted Katsumi Ishizuka genga for Zoro's big scene in 934. Genga is basically the term for key animation drawings. Its incredibly cool to see that this was seemingly completely drawn on paper(though I'm unsure about some of the impact frames).
Funny thing about Katsumi Ishizuka's scene this episode, apparently he told the episode director that he wasn't going to go that hard in terms of sheet numbers. The result was still great.