For context, when the left turn lane (the lane I’m in) has the green left-turn light on, the opposing through traffic has a red light. For some reason the driver of the small grey hatchback has missed that (they probably looked at the green light of their left turn lane, although they should have also seen three red lights for the through traffic. As a result, they started driving into the intersection almost colliding with the car in the dual lane to my left.
Always double check the proper traffic light for your lane. And scan the intersection for any unexpected traffic.