The custom of stand right, walk left grew out of airport moving sidewalks, and when they built the first big intercity pedways it became an institution. They didn’t make a lane for runners. Especially those going the wrong way.
The peds who dodge and shout to either side of Helga whip by so fast it must be working. Just like Superman: backwards fast enough is back in time, too. Back to Greensboro. Back before.
Helga tracks her progress by the rings in the pedway tunnel: at least twenty feet so far. She’s sure she can make ten more by yesterday morning.