I have very fast reactions even at my age. I’d be swearing and plowing into the cars to the right of me very quickly.
Nitpick noted, I’m still not plowing into a wall or oncoming car if I can avoid it.
I have been on a road in the middle of the night when some old guy did come down my side (two lanes each side, in the middle of a suburban commercial district, guy coming at me in the left lane) and I moved right quickly and got on the far right shoulder.