What of the below IS NOT one of the common proper evacuation responses to smoke or fire?

Common proper evacuation responses to smoke or fire typically include staying low to the ground to avoid smoke inhalation, using designated exits rather than elevators, and following established evacuation routes. An action that is NOT a common response would be to investigate the source of the smoke or fire before evacuating, as this can lead to unnecessary risk and delay in escaping to safety. Always prioritize immediate evacuation and alerting emergency services.