New answers tagged props
The robot in this particular trailer is likely a CGI model. Here is some speculation, and of all versions, the one with mostly empty head magneted to a rod inside the ball seems more or less plausible. But as you can see, the head jumps around a lot. Magnetic force weakens quickly with increasing distance between magneted surfaces, so when the head jumps ...
I think it's just a well made puppet. I believe the black and white helped it to look realistic. Latex covered in slime would be harder to pinpoint in black and white than it would be in color.
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