[ame="http://www.youtube.com/watch?v=NKXYdzH0DKA"]YouTube - World's Smallest Working Model Train Layout[/ame]
Don't you think your N scale figures on the layout want to play with trains as well? Truly a cool project. Someone call Ripley's or Guinness and get this guy the credit her deserves!
Basically the modeler has a hobby shop on his z-scale layout and wanted to show some animation in the front window. Similar things have been done in other scales (I think i've seen an HO scale layout in HO scale using a similar method, but nothing this minute!