After soccer legend Pelé backed out of lighting the Olympic flame due to poor health, Brazil chose an unlikely hero, Vanderlei Cordeiro de Lima, to ignite the cauldron at the opening ceremony Friday.
De Lima, a distance runner, is best known for winning the bronze medal at the 2004 Athens Olympics despite being tackled by a protester.
De Lima was leading late in the run, but his shot at gold was derailed when an Irish priest, Cornelius Horan, grabbed the runner and knocked him into the crowd.
Horan had a history of disrupting sporting events, including the British Grand Prix, to promote his theory that the world would come to an end.
De Lima lost several seconds before a local in the crowd helped pull Horan off him, but the damage was done.
But de Lima remained unfazed. He finished the race third, with a smile, and celebrated his victory joyously.
"If it were not for that lunatic, I am sure I would have won the gold," he said. "For the way I was running, I was unstoppable."