is one piece episode 792 filler?

As Nami, Chopper, and Carrot keep running through the Seducing Woods on Whole Cake Island, they suddenly run into an extremely large man who is buried up to neck. Shocked at the sight of him, they ask who was the one to bury him, but the man reveals that he buried himself.

Chopper gets angry at his irrational behaviors, and Nami and Carrot try to run away to prevent Chopper from getting worked up over him. The man reveals that he saw a man run past him earlier, and will tell the trio about him if they get him apple juice from a nearby waterfall.