Maybe we should just go and wait by the car?" he suggested.
Ron squinted at him, as if a light bulb had just gone on. "The car?"
"I am waiting," Severus pressed.
"I can't remember."
"Look at me when I'm talking to you. Whose. Idea. Was it?"
Harry brought his eyes up to meet the potions master's gaze, running a hand through his unruly mop of hair. "Well it was sort of… you know, a joint one."
"A 'joint one'," came the silky reply. "Do you expect me to believe, Harry, that you and Mr Weasley put your brilliant minds together and came up with something even more ridiculous than you might have alone?"
Despite knowing his guardian did not regard a shrug of the shoulders as an adequate response, Harry did just that.
Snape exhaled. "I am unsure why you have adopted such an attitude, given the circumstances."
"You didn't have to shout at us!" Harry burst out suddenly. "Or at least not at Ron. It was embarrassing!"
Severus Snape simply blinked, and did not match the boy's demeanour. "I hardly think you are in a position to be telling me what I did and did not have to do in response to your transgressions."
"You called me Potter," Harry snapped.