Harry missed a large chunk of what happened next. McGonagall had seized him by the back of his neck and forced him down to the ground and below the sudden bright flashes of light and loud bangs. While McGonagall had successfully protected him from the chaos that was currently occurring just above his head (he could hear shouts and bangs, and the furious cawing of Fawkes), in doing so she had inadvertently slammed his head into the ground, and Harry was suddenly in a world of pain and confusion again.