AspireQuiz

The two boys started in surprise at the fresh muddy imprints of a pair of
bare feet. What was a barefooted man doing on the steps of a house in the
middle of London? And where was the man?
As they gazed, a remarkable sight met their eyes. A fresh footmark
appeared from nowhere!
Further footprints followed, one after another, descending the steps and
progressing down the street. The boys followed, fascinated, until the
muddy impressions became fainter and fainter, and at last disappeared
altogether.