Saw a person trying to merge into the left lane since there was a ambulance with flares around in the right lane. The person who merged in and did it successfully but the woman in the Hyundai for some reason decided to overtake the car into actively oncoming traffic and where there were ambulances right next to them. The Hyundai driver was tailgating them and flashing their high beams. The car that seems to be the victim continue to drive straight while the Hyundai car came up right next to them and started to yell at them and went up to brake check them. Then the car took off.