Only one pair was still ...

Only one pair was still battling, apparently unaware of the new arrival. Harry saw Sirius duck Bellatrix\'s jet of red light: he was laughing at her. \'Come on, you can do better than that!\' he yelled, his voice echoing around the cavernous room. The second jet of light hit him squarely in the chest. The laughter had not quite died from his face, but his eyes widened in shock.
Only one pair was still battling, apparently unaware of the new arrival. Harry saw Sirius duck Bellatrix's jet of red light: he was laughing at her. 'Come on, you can do better than that!' he yelled, his voice echoing around the cavernous room. The second jet of light hit him squarely in the chest. The laughter had not quite died from his face, but his eyes widened in shock.
 J. K. Rowling

Quotes from the same author

Raindrops the size of bullets thundered on the castle windows for days on end; the lake rose, the flower beds turned into muddy streams, and Hagrid’s pumpkins swelled to the size of garden sheds.
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 J. K. Rowling
He didn't realize that love as powerful as your mother's for you leaves its own mark.
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 J. K. Rowling
I am prouder of my years as a single mother than of any other part of my life.
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 J. K. Rowling
So why in the name of Merlin’s saggy left — Don’t talk to your mother like that.
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 J. K. Rowling
Hermione drew herself to her full height; her eyes were narrowed and her hair seemed to crackle with electricity. "No," she said, her voice quivering with anger, "but I will write to your mother.
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 J. K. Rowling