“Oh.” Well, that's impressive. They still don't know how it works and have a million questions and experimental suggestions but... well, it's rude. Don't grill people on their powers. And they haven't been, have only asked relevant questions and had arguments with people who don't understand why Wolfgang can't take away their powers, only hide them from view.
They leave the ashes inside with the dustpan; they'll take care of it later. Then they're left standing there with their hands on their hips, quiet except for voices in the background — kids shouting, adults conversing more quietly, horns honking, distant music and corny sound effects.