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Yep, it is indeed deliberate, and is to aid the story telling in showing the car was being affected by other forces. I often wondered that in the past.
"Do I get a coconut?"
"If we get out of this, I'll buy you all the coconuts you can eat!"

VCR tape. I taped it off the SCI FI Channel about ten years ago. Back when they used to have an animation block on weekday mornings. They would show this and Droids everyday.
(Update) I found this clip, which is a snippet of commentary from the pilot episode. So apparently the effect was always there.
In the dark of the night
Every time I turn the light
I feel that God is not in heaven

Where did the version you saw come from? VCR tape, DVD, some avi file?
Mine was an old VCR tape borrowed from a friend.

I thought the exact same thing when I first saw this. It must've been intentional, because I saw it too.
In the dark of the night
Every time I turn the light
I feel that God is not in heaven