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Typically seen in shows with a live audience, there's a very noticeable type of shot where the characters are in a car with what's presumably a blue screen background, the car is obviously stationary and camera movement and usually slight rocking of the vehicle are used to give the impression of movement, for example from Frasier:

Frasier driving effect from S03E20- Police Story

Obviously there's going to be a monochrome screen behind them to composite the shot onto and some kind of moving lighting rig to emulate streetlights, but what about under the car, is there a special 'car rocking' rig at the studio, perhaps some intern out of shot, or even a fake car?

The car seems to be real in Frasier though, and the closest thing I've seen in the past is a recurring joke from Garth Marenghi's Darkplace which has a very fake car rocking about in a small darkish room:

Garth Marenghi's Darkplace: Scotch Mist

Which makes me think the rocking rig isn't as implausible as I had originally considered, as the very centre of the car doesn't move.

Pre-empting comments, please note I'm only interested in the sitcom style as the audience being behind the camera precludes the movie style effects detailed in this question.

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Sometimes it's "poor man's process." –  Meat Trademark Jun 10 at 22:14

1 Answer 1

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These are often made bespoke to fit the requirements of the Shot, but Garth Marenghi does a good job of satirizing the effect.

This is a shot from Grey's Anatomy: which, whilst not filmed in front of a live studio audience, will no doubt share the same technique:

enter image description here

Cars can be moved via hydraulics, or using a 'bump-deck': a stage which physically moves, in order to simulate extreme movement.

The presence of a studio audience has little effect on the technology used.

However, in cinema (where it is more economic/effective to shoot on location), a trailer dolly is more commonly employed.

enter image description here

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