Please, turn off your vehicle's engine.
'Spegni' = SPEN-yee — 'gn' makes a 'ny' sound; informal imperative of 'spegnere'.
Use immediately after a collision when vehicles are still running. Running engines are a fire risk when fuel leaks are present and reduce air quality at the scene.
'Spegnere il motore' (turn off the engine) is a basic safety step after any accident. If you suspect a fuel leak (odour of petrol), this becomes critical. Also prevents carbon monoxide buildup if vehicles are in an enclosed space such as a tunnel.
Tiri il freno a mano.
Pull the handbrake.
Prevents the vehicle from rolling — critical on slopes or after impact.
Accenda le quattro frecce.
Turn on the hazard lights.
First thing to do after any accident or breakdown — increases visibility.
Apra le porte per ventilare l'abitacolo.
Open the doors to ventilate the passenger compartment.
Important if airbags deployed — chemical gases are irritants.
Italian first aid guidelines (Protezione Civile) specify the sequence after an accident: 1) stop in a safe position, 2) turn off engine, 3) apply handbrake, 4) turn on hazard lights, 5) exit and place triangle. This order minimises secondary accidents.