is bleach episode 57 filler?

Having been shocked alongside Yoruichi Shihōin by the latter's Shunkō blast, 2nd Division Captain Suì-Fēng stands speechless several meters away from Yoruichi, who inquires if Suì-Fēng knows why Yoruichi never showed her this technique until now. With Yoruichi asserting that it is too dangerous, a screaming Suì-Fēng runs toward her with her own Shunkō active and attacks, only for Yoruichi to nullify her strike with Hanki.