Xavier didn't bother to apologize. She probably wouldn't hear it over the screams anyway. He had wondered how long it would take for Bellatrix to fall back on the Cruciatus. Her obsession with it was well known.
And he wasn't best pleased that McGavin's eyes were now fixed on Bellatrix, either. Scowling, he stepped forward, managing to grind McGavin's wand beneath his heel. The snap made him grin. Oh yes, that got his attention.
"You're unfit to run the Department, McGavin. Hate to tell you, but you're being sacked," he said, amused at his joke enough to chuckle. He crossed the space between him and McGavin, kicking aside a table. A cat darted from underneath the couch and his Avada Kedavra barely missed it as it streaked out the door. He needed to brush up on his aim, clearly.
With a kick, his fist connected with McGavin's jaw and he heard the pop as the jaw dislocated. "Ask me nicely to stop. and I'll put you out of your misery."
McGavin groaned something.
"What was that? I can't hear you. You've really got to speak up" Each word was punctuated by another blow until even his charm couldn't hold the man up. McGavin slumped to the floor.