“I don’t think there’s any such thing as teaching people photography, other than influencing them a little. People have to be their own learners.”
Foot zooming is when you walk closer or further from the subject without changing focal lengths. Doing so causes a change in both vantage point and point of view. This is the way photos and movies were made before zoom lenses came of age.
When you use a foot zoom, foreground and background elements maintain the same relative size and spatial relationship to one another.