The mere fact that the jogger was wearing headphones indicates a selfish disregard for his own safety and as a practical matter endangers other; in this case the cyclist. I ride in DC area often, lot's o' MUPs and lots of road riding too. If i see head phones I don't even waste my breath saying "on your left" nor do i ring a little bell. I'll not compete with headphones, period. Additionally if walkers or joggers are two abreast with no headphones, I'll warn them, three abreast, I cut as close to them as possible.