Cold sweat had erupted on Faelan's skin, and his chest heaved as he tried to catch his breath. For a moment, he didn't understand what had stopped Sirius falling, but then, as he trembled and his legs grew weak with sudden fatigue, he realized that he had done it. He flexed his hands, which tingled with a strange electricity, and a ringing in his ears made it difficult to comprehend that Harry was yelling at him before the others were shouting and, most importantly, Sirius was floating safely in mid-air.
He fell to his knees and stared at his hands.
"I don't know," he said. It was as much an answer to an unspoken question from himself as it was a belated reply to Harry.