Running around the outer edge of the park was ordinary for Rickey. He ran it every day of the week. He lived close by, and he liked that the distance was clearly marked. He left his apartment, walked to the park, and then ran the roughly five-mile stretch in approximately 33 minutes. He ran at a comfortable pace. He didn't need to push his pace nor to slack his pace. He used this to get in his daily exercise and it was good enough for him.

The weather could slow him down when it was raining hard or worse snowing. There was little to be done if he wanted to run his usual park course.

Mary also used the outer edge of the park for her daily exercise. At least she used part of it. Ricky had to run around the park seven times to get in his five miles. Mary used a different part that overlapped the park perimeter for a short stretch.

There was another difference between how Ricky and Mary exercised, Ricky liked to jog, Mary was doing more of a power walk. Mary could have jogged if she liked, and Ricky could have power walked, but this was their own personal preference. This was a gender-based thing, that is what they liked and neither saw any reason to change

When Ricky happened to pass Mary (he passed her as he was going faster) the Trait Swapper made a small swap that neither noticed at that second. The Trait Swapper swapped their feet. The change didn't slow or speed up either person, they were now simply running with each other's feet.

The only difference besides Ricky's feet diminishing to what would be a size five woman's foot and Mary's expanding to a size ten men's foot was that their shoes had also been resized to accommodate their feet's new proportions. The style of the shoes hadn't changed, just the size.

Ricky returned home after his run, got out a drink to re-hydrate himself, and sat down in front of the TV to relax. As his feet were on the ground, he didn't notice anything different about them.

Mary had a similar experience except she set out to answer her messages on her phone. Neither noticed anything, not even when Mary kicked off her larger shoes which she always did. She liked to walk around barefoot when in her house.

Ricky was the first to notice when he got undressed to have his nightly shower. She liked to shower at night after his run. It was better than waking up early and running and then showering after. When he took off his shoes and socks and saw his feet, the size wasn't what he noticed first. His nails were painted in a peach color.

"What?" he thought.