Oh boy, he does sees that there is now whipped cream coming after everyone right now. Quickly, he immediately dodges at the whipped cream as fast as he can before pulling out his wand to cast a Shield Charm to keep a couple of them at bay.

As for the rest, he then switches in with the kinetic magic he has gotten from Avalon to fling the whipped cream at different directions, some landing on so more people and others landing on the walls.