Quite a few years ago when my husband was alive, this happened. Must have been about 15 years ago now.
I had to go out, and was out all day. My husband was at home working.
When I came back home around six, he looked like he'd seen a ghost! He told me that some time late morning he had been sitting in the living-room drinking coffee, and heard heavy footsteps in the room above (which was a room I used for art work and various things)
Now he was not kidding me, and also was a level headed person. He would not have hallucinated, and wouldn't make this up.