A Boeing 737-800, operated by Israir Airlines, experienced a significant evacuation at Budapest Ferenc Liszt International Airport due to smoke entering the cabin during a flight from Budapest to Tel Aviv. The aircraft’s tow truck emitted smoke, which entered the cabin, leading to the opening of rear emergency exits. The unstable rear slides caused a delay in engine shutdown, resulting in a passenger falling from the slides and sustaining a serious head injury. Investigation revealed a lack of communication from the galley crew regarding the situation, compounded by passenger anxiety, misjudgment of the smoke’s origin, inadequate emergency procedures, delayed crew response, and an unauthorized evacuation.A Boeing 737-800, operated by Israir Airlines, experienced a significant evacuation at Budapest Ferenc Liszt International Airport due to smoke entering the cabin during a flight from Budapest to Tel Aviv. The aircraft’s tow truck emitted smoke, which entered the cabin, leading to the opening of rear emergency exits. The unstable rear slides caused a delay in engine shutdown, resulting in a passenger falling from the slides and sustaining a serious head injury. Investigation revealed a lack of communication from the galley crew regarding the situation, compounded by passenger anxiety, misjudgment of the smoke’s origin, inadequate emergency procedures, delayed crew response, and an unauthorized evacuation.