Last Saturday along SLEX towards Santa Rosa, I flashed a black EK Civic hogging the overtaking lane since I was ready to pass and he's definitely below 100. He moved to let me pass but he immediately went to my tail continuously flashing his headlights. I moved out of the overtaking lane to let him pass but he kept following me to whatever I go while continuously flashing. I had my family with me so I just kept my cool but in my head I was already yelling "what an IDIOT!". He probably didn't even know that he got flashed because what he was doing was wrong. Dumba*s.