Flaviu Cernescu, a juggler, unicyclist and all-round daredevil, found the perfect spot to test his talents last August – a rigid-frame bridge on the Romanian side of the Danube, near the Serbian br.Cernescu and his girlfriend, Dina Zaur, both scaled the structure, and Cernescu recorded the dizzying feat of him unicycling along the bridge’s steel girders, bumpy rivets and all. Credit: Flaviu Cernescu via Storyful