move behind

As he spoke he felt an object move behind him, and, looking back, the shadow of the Entailed Hat was dancing on the wall.

And, afterwards, as you know, I told you I thought I heard someone move behind those little trees.

Noticing something move behind a curtain in the corner of the bedroom, she pulled it aside.

Then he saw the grass move behind the first leaping, striped back, and he knew there were more cats afraid of Uncle Jonathan.

There was a pause, in which Walter thought he heard some one move behind him.