The Dolly Zoom or Vertigo Shot

Goes by many names, including optical compression, tracking zoom, dolly zoom, Hitchcock zoom, contra-zoom, trombone shot, and push-pull zoom.
Also sometimes referred to as the Vertigo Shot


The Vertigo effect explained
Please click on the link below:
http://tvtropes.org/pmwiki/pmwiki.php/Main/VertigoEffect