An example that gas-related diagnoses can be more confidently diagnosed with PMCT than autopsy. This patient died during a midtransport resuscitation attempt following a car accident. Initial clinical examination found a haemothorax; however, it was unclear if the patient died due to blood loss or from some other underlying pathology which may have caused the accident. During air ambulance transportation, ventricular fibrillation occurred. PMCT showed an air embolus in the left anterior descending artery (1), probably due to extensive lung trauma and the decrease in atmospheric pressure during the flight. This was not diagnosed at autopsy, with death being attributed to a haemorrhagic shock due to haemothorax. Also, the pneumothorax, pneumopericardium and pneumomediastinum were not mentioned in the autopsy report. PMCT, postmortem CT.