what he was doing, he started forward, but there was a sudden movement on either side of him and two pairs of hands grabbed him and held him back.... "No, Harry!" Hermione gasped in a petrified whisper; Ron, however, spoke to Black. 

"If you want to kill Harry, you'll have to kill us too!" he said fiercely, though the effort of standing upright was draining him of still more color, and he swayed slightly as he spoke.

 Something flickered in Black's shadowed eyes. 

"Lie down," he said quietly to Ron. "You will damage that leg even more." 

"Did you hear me?" Ron said weakly, though he was clinging painfully to Harry to stay upright. "You'll have to kill all four of us!" 

"There'll be only one murder here tonight," said Brack, and his grin widened.

"Yeah, yours," Amelia snarled.

 "Why's that?" Harry spat, trying to wrench himself free of Ron, and Hermione. "Didn't care last time, did you? Didn't mind slaughtering all those Muggles to get at Pettigrew... What's the matter, gone soft in Azkaban?" 

"Harry!" Hermione whimpered. "Be quiet!" 

"HE KILLED MY MUM AND DAD!" Harry roared, and with a huge effort he broke free of Hermione's and Ron's restraint and lunged forward - 

He had forgotten about magic -- he had forgotten that he was short and skinny and thirteen, whereas Black was a tall, full-grown man -- all Harry knew was that he wanted to hurt Black as badly as he could and that he didn't care how much he got hurt in return -- 

Perhaps it was the shock of Harry doing something so stupid, but Black didn't raise the wands in time -- one of Harry's hands fastened over his wasted wrist, forcing the wand tips away; the knuckles of Harry's other hand collided with the side of Black's head and they fell, backward, into the wall -