"I’m not doing anything! Stop shouting!" Harry hissed, wand raised and held aloft in front of him, trying desperately to see through the impenetrable blanket of darkness that had been laid upon them. Then, ahead of them, he heard it - the rasping rattling breath of a dementor approaching. He swallowed against his nerves, preparing to cast, scrambling to draw on the happiest memory he could - but they all turned to ash in his mouth as misery and despair threatened to suffocate him. There was screaming in his ears - screaming mixed with high pitched laughter as always; except now there were new sounds. Different laughter. Harry realised with a jolt he was hearing the happy laughter of James, Albus, and Lily swirling about his skull. Misery clawed at his throat, but for the first time he almost welcomed it. He felt a sudden sharp pain in his knee and realised that his legs had given way beneath him.