and then i stood up , glared at him , made a hissing sound , scratching my sides through my shirtdoing this until the crawling sensation all over me was so distracting , so claustrophobic i pulled the thing off over my head , lurched my arm back to throw it but the hand impacting the wall sent a numb shock through me , broke my anger , brought me low to my knees , laid me to my side , burying my face in the raised up bend of my elbow .