" Is it true you shouted at Professor Umbridge?'
'Yes,' said Harry.
'You called her a liar?'
'Yes.'
'You told her He Who Must Not Be Named is back?'
'Yes.'
Professor McGonagall sat down behind her desk, watching Harry closely. Then she said, 'Have a biscuit, Potter. "

― J.K. Rowling , Harry Potter and the Order of the Phoenix (Harry Potter, #5)