The great film director Alfred Hitchcock spent Vertigo solving a problem most would rather avoid: how do you make a room feel like it's stretching away from someone without actually moving them?
The answer, dolly the camera one way while zooming the lens the other, has become known as the Hitchcock zoom. It's one of the hardest shots in film-making to pull off. It needs a rig, a crew and several takes to get the timing right.
