Trials bike vs roller coasterAmusement park mayhem Joe MurfittFri, 16 Jun 2017 AS IF amusement parks weren't amusing enough already, here's French Moto Trials legend, Julien Dupont, taking on the Montaña Rusa at La Feria de Chapultepec amusement park in Mexico City, with a trials bike. MADNESS!trials bike tricksmotorcycle roller coastertrials bike on roller coasterred bull videosred bull trials bikes