Ludo watched in wait. Surely the Headmaster would skip the telling off and go straight to banishing Peeves.

But then the Gryffindor girl decided to do some Q&A with Peeves and Ludo was not suprised to see him not take it seriously.
He gasped as the poltergeist pulled two potions out. He was going to dump them.
"No..." Ludo breathed. Too late. The potions were dumped on her head and Ludo waited for a BOOM...or some other gruesome event to occur. But nothing did...not yet at least.