The reporter was in Benghazi to cover the ongoing civil unrest when a shot came in his direction as rebel forces and Libyan military officers began attacking each other.
Rivera tells Fox & Friends, "It was the kind of situation where it evolved kind of (from) a single sniper shot, then we took cover.
"There was a wild exchange. It was like a shoot out between two unruly gangs: the professional soldiers, the Gaddafi soldiers. Every time they unleashed their salvos, the rebel irregulars would wildly retreat or fire their weapons.
"It was a wild, wild scene. I was as worried about being shot in the back by the 'good guys' as I was worried about being shot in the front by the bad guys."
And Rivera is also concerned about the damage that could be caused if the rebels obtain stronger weapons.
He adds, "I swear to God, if you give these people weapons more powerful than they have right now, they will be a grave danger to themselves and others. They don't know how to use these weapons. At the first sign of a threat, they let loose their salvos. When you have incoming (fire), the time when real soldiers use training and experience... that is non-existent in the rebel army. They have the fire discipline of an L.A. street gang. It was really very worrisome."