Stephen Moon, an avid cyclist, was alarmed when he first noticed a warm sensation of blood, followed by a clear fluid running from his nose. Unbeknownst to him at the time, this fluid was cerebrospinal fluid (CSF), the vital liquid that cushions the brain and spinal cord. Such a symptom is rare and indicates a serious injury that requires immediate medical attention. The presence of CSF leaking from the nose often points to a breach in the protective membranes surrounding the brain, commonly caused by trauma. Stephen’s experience highlights the importance of recognizing unusual symptoms after head injuries, as timely diagnosis and treatment are crucial to prevent further complications.