I was travelling on a train from Jakarta to Surabaya. As the train left the station, there was a long announcement of all the stops, and people were warned that smoking is forbidden, 5 times! At the end there was a sixth reminder that smoking is not allowed and people who get caught smoking will be forced to leave the train at the next stop... Then, as the train left the last stop before Surabaya, all the carriages filled with smoke, and the train looked as if it was on fire...95% of the passengers on the packed train all started smoking at the same time.