Trombone Shot (Dolly Zoom)

Above is an example of the dolly zoom effect is an unsettling in-camera special effect that appears to undermine normal visual perception in film. The shot tracks forward and zooms out at the same same time in order to do this, mainly to show a sign of warning or distress from the charceter.World renowned director Alfred Hitchdock is said to of made the technique famous in his film Vertigo, it was used by Steven Spielberg in Jaws and ET.