Dolly zoom

Also called: Vertigo effect, Trombone shot

A camera technique that combines travel and an opposing zoom to keep the subject the same size while changing the background perspective.

Compare the person staying the same size while the doorway and mountains grow with 'Static shot'.

Often confused with

Dolly: A camera move without an opposing zoom, so the subject changes size as well
Zoom: A camera technique with no camera travel, so lens magnification scales the subject and background together