An 18-year-old college freshman presents to the emergency ro…

An 18-year-old college freshman presents to the emergency room for evaluation of fever, headache, and neck stiffness. On physical examination, the patient is resting quietly and has a flushed face. His vital signs are as follows; temperature, 104 F; pulse 110 bpm; and BP, 105/70 mm Hg. He has no rashes. During the physical examination, you flex the patient’s neck and his hips and knees flex in  response, indicating meningeal irritation. The name of the positive sign is?