Cedric crinkled his nose at her impression of him and sat up on his air mattress to look over at her. "Oi- first of all, that sounds nothing like me." He tossed one of his pillows in her general direction. "Second... you're right. You do take up too much room. I've seen how you sleep."
Cedric heaved himself off the mattress and did another graceless flop onto his bed this time, sprawling himself out spread eagle to take up as much room as was physically possible in an imitation of her supposed sleeping habits. And followed it up with a loud snore.