“Mostly they laughed because they laughed, feeding off each other until they could barely stand.”

“Because - oh shut up laughing, you two - because they've just been turned down by girls they asked to the ball!”

“It seemed impossible that there could be people in the world who still desired food, who laughed, who neither knew nor cared that Sirius Black was gone forever.”

“Hand over the prophecy and no one need get hurt," said Malfoy coolly.It was Harry's turn to laugh."Yeah, right!" he said. "I will give you this - prophecy, is it? And you'll just let us skip off home, will you?”

“I’m never wearing them," Ron was saying stubbornly. "Never.""Fine," snapped Mrs. Weasley. "Go naked. And, Harry, make sure you get a picture of him. Goodness knows I could do with a laugh.”

“Parvati positively beamed. Harry could tell that she was feeling guilty for having laughed at Hermione in Transfiguration. He looked around and saw that Hermione was beaming back, if possible even more brightly. Girls were very strange sometimes.”

“You can laugh! But people used to believe there were no such things as the Blibbering Humdinger or the Crumple-Horned Snorkack!”