Trudy's command cuts through the chaos and noise. But with all the freshmen's eyes on him, Lionel isn't so sure this is better than before. "Oh um, so uh-- the Bubblehead Charm. Yes, the Bubblehead Charm, so."

He pulls up the sleeve on his wand-casting hand just a little for ease of motion. "Everyone in positions," he instructs and waits for the freshmen to follow suit. They do. He then points his wand at his face and waits for the freshmen to follow suit. They do. "Now, it's important you say the incantation correctly and clearly. You don't want to fire the wrong spell at yourself."

His voice is a bit muffled and distorted by the bubble around his own head. Hopefully that won't be a problem, though.