He was yelling so loudly that his voice echoed in a high pitched manner all throughout the library. His nuts were turning an angry red colour as Bellatrix held onto them, making him grunt and yell more, almost to the point of where he was screaming. Him thrashing around so violently could possibly hurt unborn Harry as well, not that he seemed to care much on that topic at all. Although, he would most likely anger the mama witch whom had a vice like grip around his testicles.