Similarly, this may have happened to me. I went early in the morning, to do the same approach you did … brisk walk and maybe jogging a little if I was certain that I was not bothering anyone, because there was no one in view.
So, I started jogging along at one point, when all of a sudden – from the apartment building across the street – an old woman yelled out, “THAT’S NOT FOR YOU!”
I felt kinda terrible at the time, but now it makes me laugh every time I am anywhere near there. 