A 24-year-old man who was involved in a head-on automobile accident is brought to the ED. Paramedics report that the dashboard and steering wheel were pinned against the patient’s abdomen and legs for 1 hour before rescue workers were able to release him. The patient is conscious and in severe abdominal and pelvic pain. His vital signs are stable: blood pressure, 120/70 mmHg, pulse rate 86 beats/minute, and respiratory rate 22 breaths/minute. The nurse notes that the patient’s penis and testes are swollen and painful and that blood is oozing from his urethra. The physician diagnoses a pelvic fracture with genitourinary trauma, and then calls the urologist. Which history finding would lead the nurse to suspect that the patient has a ruptured bladder?