Everything was chaos and she was dizzy, the room was swirling around her, her stomach roiling sickly, and Hermione wondered vaguely what they were all inhaling, and how much she'd inhaled before she'd cast the bubblehead charm, and if it was enough to kill her. She pressed her back hard against the crates as if that would steady the room and settle her stomach, and tried to catch her breath, but she couldn't seem to drag in any air. She couldn't seem to concentrate, feeling like dissolving into helpless, confused tears, but instead she made her eyes focus, poked her head around the crate and aimed a stupefy at one of Kiam's people. He toppled, his bubblehead charm dissipating and Hermione felt brief guilt that her stupefy was probably going to end up being fatal for the wizard. But they had murdered the Russian scientist, Yuri, even though he wasn't any danger to them whatsoever, and they'd murdered Delia Tiptree without a second's hesitation.