At the rumble of stones and the appearance of a giant pillow Kitty realized what happened. Her cheeks blazed red with mortification. This was soooo much worse than a student choking. Okay, that too was bad, but at least Gus hadn't managed to collapse a room on anyone. Callum's shout brought her back to reality as he grabbed her robes and pulled her backward. A chunk of stone landed right before her toes. Eyes wide she scrambled backward mutely, clutching at Callum.