This weapon configuration still left the gunship blind to the direct rear, and Mil experimented with fitting a machine gun in the back of the fuselage, accessible to the gunner through a narrow crawl-way. The experiment was highly unsuccessful, as the space was cramped, full of engine exhaust fumes, and otherwise unbearable. During a demonstration, an overweight Soviet Air Force general got stuck in the crawl-way. Operational Mi-24s were retrofitted with rear-view mirrors to help the pilot spot threats and take evasive action.