On a curvy, 2-lane road, moderate traffic both ways, my vehicle performed unnecessary emergency braking for on oncoming vehicle while negotiating an S curve. There was no vehicle in my lane in front of me, the oncoming vehicle was squarely in its lane, I was in my lane, both of us had several cars following behind. But we had both just passed the apex of our respective curves and were approaching each other in the middle of the S. All warning lights flashed, my car applied emergency braking, and vehicle behind me took evasive action to the right shoulder in order to avoid a rear collision.