When trailrunning, my worst injuries happened on flat and groomed paths, when I was not expecting potholes. When the trail is rough, I concentrate more and nothing happens, even if it is (at first sight) much riskier.
I'll have to mix up the path I take around that bit to keep my brain awake and aware! Good shout!
I usually follow tractor tyre lines as it was until recently working farmland (I'd never want to damage the crops!) but it's just regular grass this year so I can walk wherever freely - I think the farmer sold the land so the council can run a road through the middle of it.. trying to get the most out of it before it's paved over and I need to find a new regular trek haha