(IDAHO FALLS, ID) – An Idaho Falls man was arrested early Wednesday after firing his gun during a road rage incident. Authorities say 21-year-old Christian Robertson was upset with another driver as they were traveling on Ammon Road. The victim says Robertson pulled up next to him, pointed the gun directly at him, and then fired a shot up into the air. The other driver ducked down, then quickly sped away and called the police. Robertson was arrested at his home a short time later on a felony charge of aggravated assault. A preliminary hearing has been scheduled for October 8.