A series of brawls broke out at Georgia's Six Flags park on its 'Opening Day' that led to a tense gunfire exchange between suspects and cops.Six Flags Over Georgia opened for the first time this year on Saturday - but what was meant to be a day of rollercoasters and fun turned into chaos and panic.Fights broke out within the Austell park on Saturday evening, with teens running through the park and a group of males kicking one person to the ground.