mars , his arms handcuffed behind him , lay prostrate , increasingly uncomfortably on his back on the lightly sloping roof ; and grey could understand why the young constable had wanted violence done unto him ; and why other officers , the bad ones you read about in the papers , might at this point a doctor yet to attend , the mans present injuries as yet unknown , with no one watching have wanted to land a size-nine right into his midriff , again and again till his kidneys burst and his liver couldnt cope with the injuries to his system .