staff riding
n.— «Soweto youths aren’t alone in their crazy train-surfing habits.…James Oatway first encountered the local variant, otherwise known as “staff riding,” while at City Press. “I was asked by the picture editor to accompany a reporter and speak to some boys that were ‘doing stunts on a train.’”» —“The Big Picture: Train Surfing” by Sean O’Toole Times (Johannesburg, South Africa) Oct. 28, 2007. (source: Double-Tongued Dictionary)