In 27 years I haven't seen that before either on my walks with Ollie or seeing them from inside.
Funny to me was the cat didn't act "cat like" but rather followed the couple just like a dog would...no stopping and keeping up with it's hoomans.
Wonder how long they walked? I mean as far as Ollie and I do?...or as long as it's hoomans wanted to?
What about you all?...just a block or so or almost a mile?
Kb - Pip and I had Spot Henry the Dumpster Kitty that adopted us down in the Keys.
He was living out of the dumpster behind a seafood joint. We pulled in to do a Chinese fire drill driver swap and he jumped right into the pickup and wouldn't get out. We went into the seafood place and asked them if anyone owned this cute little guy ?
They just grinned and said nope he's all yours if you want him.
OK_well this is his spot I guess and we dub you Henry the Dumpster Kitty.

Pip was a vet tech and she figured he was no more than a year old by his teeth. He lived with us in the keys for a few years and moved back to NJ with us when we did. This guy was a true wild child to put it mildly.

For 19 solid years swinging from the chandeliers this cat of extraordinary character did reside with us, and by reside with us he roamed with us as well.
We would take him on miles long day hikes on a leash.
He loved it.
It didn't tucker him out either .. we would get back home and he would still have the energy to destroy something.