Changing the subject slightly ... but not really ... my sister and her Dh have a blind friend who runs. My brother-in-law runs with him and is his guide. They basically have a system down as to what BIL (brother-in-law) says when the blind friend needs to avoid something. They were running with a group along a trail one day. They went down a hill and hit a flat section that was half covered with mud. The runners moved to the dry section to run around the mud. Just as BIL and blind friend were in that section, a cyclist came screaming down the hill in front of them. BIL yelled for his friend to move a specific direction to miss both the cyclist and the mud. It was opposite of what he normally says, but on purpose. Blind guy was confused did the opposite and collided right into the cyclist. The cyclist started yelling obscenities until he realized the guy he hit was blind, then was all apologetic.

Blind guy got up, brushed off the road rash crud and said, "Let's go!" (This guy actually runs marathons. Amazing.)

I'm not sure how this relates to this thread except that it's for sure a very interesting "cyclist vs. runner" story to say the least!!!