Over the years Grbic has saved people from all social backgrounds and has become something of an expert at spotting those likely to jump and their chances of survival.
"You can recognize a potential suicide on the bridge. This is not the center of the city, there aren't many people who walk over the bridge. Those who go over the bridge in order to cross walk at a busy pace and do no more than glimpse at the water. The suicides walk slowly, hesitantly, looking down at the river."
Those who survive the jump from 19 meters (63 feet) always ask for help.
"I believe that at the moment they jump they are already dead, but if they emerge, it's a completely different story. Then they become aware of what they have done. They fight, call for help, scream," explains Grbic.
He is a fourth generation fisherman who grew up on the Danube where he opened a fish restaurant with his wife under the Pancevo Bridge on the riverbank. Here, he spends most of his time watching the bridge. The walls of his restaurant are decorated with humanity awards.
"Every minute is important, that's why I think everyone I saved is predisposed to live. I feel very special after every rescue. I am usually overwhelmed by feelings, I know I have done the right thing," he said. "In the ideal world I would love not to do this, if only people would respect their lives more."
Renato loves to travel and he says will travel to Thailand soon.
"I would ask people not to try to jump off the bridge! There will be no one to rescue them.'
In ancient Greek mythology, it was Charon who was in charge of ferrying the dead across the River Styx on their final passage to Hades. But under Belgrade's Pancevo bridge there is a fisherman with a boat, and other ideas.