Don't be too sure that he saw you; I was once out running in the dark with Flying Ant of this parish, both of us in head torches, hi-viz reflective bibs, plus reflective flashes on our kit, when we were nearly collected by a car.
A few moments later, he'd turned round and pulled up alongside us and wound down the window. 'You ought to make yourselves more visible, lads,' he said. We were too stunned to have a go.
Taking the act of pulling out into the middle of the road as a sign that they'd seen us, we estimated that every other motorist could see us from about 300yds away.
Of course, some people are just knobs; I had a cracking game of chicken with a tractor the other day; he flinched before I did, but he was intent on driving at me.