I've had trail runners arrive and stand for a while at the top of a hill after I've already started up a very loose, rocky and steep singletrack toward them - the kind that one little wrong tweak and your wheels spin out - and then just start running right at me. Their answer to "where did you think I was going?" is met with either a shrug or "runners have right of way." Safety or courteousy is not part of their world.

There are some people who just think the world revolves around them. One day, it will slam them a bit harder than they bargained for.