Sure its fun to watch cars brake to avoid your hand, but I have a hard time placing any part of my body out into traffic to stop speeding cars. I'm just saying that if people are really passing within inches of you, then sticking an arm out to stop them is awfully risky. It may work 99 times in a hundred but that's not really good enough. It also means the OP has to keep constant watch over the left shoulder while taking this corner. Is that wise when he says there are patches of gravel in the right wheel path and that cars try to pass on the right when he's in the left wheel path?