An Austrian stunt cyclist took his bike to the top of a 650-foot-tall dam to ride across the ultra-narrow top of a safety railing. The vertigo-inducing video posted to YouTube by Fabio Wibmer shows the cyclist’s helmet-mounted camera footage as he rides the railing, which is barely wider than his bicycle tire, atop the 650-foot-tall Kolnbrein Dam in Austria.
Wibmer said it took him about seven tries to make it the full length of the railing and his only safety measure was a rope held by a single supporter. “I’m definitely happy that I didn’t need his help, because I don’t want to know how it would’ve ended if something had gone wrong,” said Wibmer.