Start with a Close up on you head spinning protagonist. On action, the actor turns his/her head as far as he/she can to the left.
Cut to: reverse shot of the actor, with shirt, jacket, pyjammas (whatever) on backwards. Actor turns head from the extreme right to the extreme left.
Cut to: original close-up. Actor moves head from extreme right to centre.
I think this was done in the old Chevy Chase movie "Modern Problems", but I may be wrong. It would save big bucks and time rigging effects anyway. Plus it may be funnier than a mannekin's noggin spinning around. Maybe. What do you think?
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