Fair play - that would scare the sh*t out of me.
Mind you, about 10 years ago I was driving across the USA. I pulled out of a gas station in the middle of nowhere and forgot to drive on the right. All was well for a mile or two as there were no cars, and then this guy starts flashing me with his headlights from up ahead. Well, I flashed him back, what with him being on my side of the road and all that, cheeky bleeder. With seconds to go I suddenly realised what had happened and careered up the gravel hardshoulder to avoid him, you should have seen the look on his face - priceless! He gave me the bird
and so did his young son in the back seat
Hey Ho.