Fighting virtual fires prepares métro drivers for real emergencies

There’s a loud pop, and flames start shooting out of the back of the métro.
The métro operator uses the loudspeaker to tell people to evacuate the train, and a current of air blows in the faces of passengers, to direct smoke away from them.
After the passengers leave, the métro operator grabs a hose that is attached to the wall and sprays it in the direction of the flames.
That’s the drill that has been worked out hundreds of times at the Société de