With a shout of fury Hagrid launched himself off the bike at the Death Eater; to his horror, Harry saw both Hagrid and the Death Eater falling out of sight, their combined weight too much for the broomstick - Barely gripping the plummeting bike with his knees, Harry heard Voldemort scream, Mine. It was over: He could not see or hear where Voldemort was; he glimpsed another Death Eater swooping out of the way and heard, Avada - As the check this out from Harrys scar forced his eyes shut, his wand acted of its own accord.
He felt it drag his hand around like some great magnet, saw a spurt of golden fire through his half-closed eyelids, heard a crack and a scream of fury.
The remaining Death Eater yelled; Voldemort screamed, No!: Somehow, Harry found his nose an inch from the dragon-fire button.
...