For those not in the know, Wallaby is from an Australia-based high school, and she's parodying the pose of "Raygun" of Team Australia from the breakdance competition.
Although the Clumsy Nun is sad, is good to see the rest of the nuns are doing their best to cheer her up. And I'm also glad the ducks doesn't have any hard feelings with her, despite she tried to give their house to the dog.