To deter people from "train surfing," where they sit on the roofs of carriages, Indonesian authorities resorted to knocking 'em off with concrete balls!
Previous attempts to deter roof riders included spraying roofs with paint, spreading oil on carriages and hiring musicians to perform safety songs.
Correspondents say those initiatives have failed. Officials hope that the latest move will prove to be the ultimate deterrent.
Previously on Neatorama: Indonesians to Spray Train Roof Riders, Lying on Train Tracks is a Folk Remedy