In Belgrade, Serbia, if you bumped into Renato Grbic, he would not strike you as a modern-day superhero.
The shaven-headed, tattooed Belgrade fisherman is no Clark Kent. Yet, his watchful eyes and quick reactions to events at the Pancevo Bridge have earned him the title of "Superman of the Danube." Instead of a cape, he has used his small boat to record 25 lives saved so far.
"There's nothing to beat the adrenaline when you save a life. When I hear the splash in the water, my heart starts beating faster, and there is only one question on my mind. Will I get there in time?"