Dolly in, zoom out.
You will have seen it. The intended warped perception, the altered time focus, the supernatural space shift. You will have experienced the intended unnatural effect.
Understanding and appreciating the dolly zoom gives a high-end insight into the secret tremendous art of film making.
With thanks to Vashi Nedomansky for highlighting the finest moments of Irmin Roberts' conception, set to Bernard Herrmann's theme for Alfred Hitchcock's Vertigo, where it all began.
Just be even more glad for normal space-time reality after the credits roll.