It’s the afternoon on a sunny day.
You’re walking down a concrete pavement. The pavement is in pretty good condition, nice wide slabs, laid nice and level, maybe two metres across to the roadside. It’s pretty clean too, with an absence of litter.
There are not many people around. You’re in no hurry although you do have a destination in mind.
Up ahead, perhaps ten metres away, you notice a pebble on the pavement. The pebble is about three cm in diameter and is smooth and is best described as shaped like an oblate spheroid. It’s in your path, roughly centrally placed on the pavement.
What is your course of action?