Marching out to Sea

The last time I saw this green foot was a couple of days ago, half a mile further up stream. Where had it come from? It certainly knew where it was going - back out to sea. Maybe it will end up swirling around in the middle of the Pacific along with tonnes of other plastic rubbish. Maybe it will end up on another shore for another Blipper to find it and capture it. Who knows. Somewhere out there it is marching on (probably bobbing along) off on it's own little adventure. Happy foot?