is attack on titan (shingeki no kyojin) episode 33 filler?

In the last moments of their struggle, Eren gains the upper hand over Reiner. Suddenly, the Armored Titan lets out a roar, and above on Wall Rose the Colossal Titan begins to topple over.

A soldier cries out to the Scouts below, but they cannot react in time as Bertholdt's Titan comes crashing down on Eren and Reiner, exploding in a ferocious burst of steam. Sasha shields Armin from the wind as the rest of the Scouts at the base of Wall Rose are hit head-on by the storm, pushing them all away.

The soldiers atop the Wall are unable to assist, held back by the mighty winds.