Scientists have determined that the most irritating sound to the human ear is the sound of a knife cutting a glass bottle. And the second-worst sound is a fork scratching a glass bottle. Evidently they did all their research at the Picnic for Morons.
It may not always feel wonderful. but you're out there doing it. You're running while others are just walking. Or sitting around. I mean, come on - you're out there running, for goodness sake. You're to be taken seriously.