is one piece episode 946 filler?

Luffy recalls how he saw Rayleigh used Ryuo. Back at Sabaody Archipelago, Camie was fitted with an explosive slave collar as she was trafficked into slavery.

However, Rayleigh used Ryuo to remove the collar with a single hand. Back in present day, Luffy uses the same method in an attempt to repel Big Mom's attack.

Luffy's defense fails and Big Mom sends him and Hyougoro crashing into a wall. Luffy is unharmed but Hyougoro was hit hard on the head.

Hyougoro congratulates Luffy for successfully learning the technique before he collapses in Luffy's arms.