Silverpilen is a Ghost Train myth in Grand Theft Auto V. According to the myth, there is a subway train that rarely appears that the player can board. Once boarded, however, the player is doomed. The train will ride on, never stopping, and never coming across another station.
Silverpilen is a real life proven myth from Sweden. As the myth goes, Silverpilen is a haunted subway train that abducts unwary boarders, who are never seen again. In fact, Silverpilen was an experimental back-up subway train used between 1977 and 1996, before being decommissioned. It is a completely unmarked silver train.