A teenager has been filmed risking his life by "tram surfing" during Manchester's rush hour - all while talking on his mobile phone.
Transport bosses warn that the trend - which sees people riding on the outside of a moving tram - will see someone killed "sooner or later".
The footage was filmed by a passenger on board a 5pm tram from Manchester to Rochdale.
Kayman Grant, who works as a bus driver, said they hoped the boy's parents would see the footage and take action.
He added that he didn't film the boy to shame him, but to highlight the issue and his behaviour.
In March Transport for Greater Manchester ran a specific campaign to crack down on the practice.
TfGM's head of Metrolink Danny Vaughan added that people should contact them via the help points on trams or at stops, so that they can safely bring the tram to a stop.