"That's what your wands are for. There's a charm for that. A few similar ones for different situations actually! If you didn't prepare yourselves by looking up how to do it... Well! That's not my problem is it?"

He took the broom with gentle care and a bit of reverence. He would take care of it while he had it in his possession, that was certain.

After a moment he decided to give them a hint. "The centaurs know about your detention. They're very displeased. But! If you think you've proven yourselves worthy they might be able to assist you. I wouldn't go unless you were absolutely sure though. They aren't big on second chances."