紐育の地下鉄では地下鉄に跳び乗る「地下鉄サーフィン(subway surfing)」というのが行われて、命を落とす者も出ている; Michael Stallone "15-year-old killed while subway surfing on NYC train" https://www.fox5ny.com/news/subway-surfing-teen-killed-manhattan-train Larry Celona, Jack Morphet, Craig McCarthy, Jorge Fitz-Gibbon and Rthvika Suvarna "Teen kill…