is one piece episode 606 filler?

The Straw Hats and Kin'emon are all escaping on Brownbeard, who is complaining about having to carry all of them, saying they should run unless they are injured. The riders give petty excuses as to why they cannot run, and Brownbeard does not believe any of them.

Close behind them, Tashigi is still saddened by the loss of some of her troops and in shock about how all the activity going on under the Marines' noses, but a soldier tells her they have to keep moving and she agrees. The soldiers next notices something coming from the roof.