Nonaccidental trauma is a significant cause of morbidity and mortality in children. We describe a case of a child who presented with intraperitoneal bladder rupture after sustaining blunt abdominal trauma. As per confession, the injury was apparently the result of the child being forcibly pulled into her caretaker's knee while the child had a full bladder. Diagnostic findings included an acute abdomen, gross hematuria, azotemia, and free intraperitoneal fluid visualized on computed tomography. Emergency exploratory laparotomy revealed rupture at the dome of the bladder. Bladder rupture as a result of nonaccidental trauma has been reported in 3 previous cases.