'Make way for the heir of Slytherin, seriously evil wizard coming through …'
Percy was deeply disapproving of this behaviour.
'It is not a laughing matter,’ he said coldly.
'Oh, get out of the way, Percy,' said Fred, 'Harry's in a hurry.'
'Yeah, he's nipping off to the Chamber of Secrets for a cup of tea with his fanged servant,' said George, chortling.