Split Personality?

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Originally Posted by Quempel

Is gollum running with the ring or without the ring?

Without. Gollum clearly dances when he has the Ring, meaning motion in a non-linear trajectory, which precludes running.

Is he a trained runner?

Swimmer and tree climber. His lapses into running like a dog, though he being obviously humanoid, would make running slow. Built not for speed but for stealth, though he does have that hobbit gene for perseverance.

Is he human or what?

Hobbit kind. Even Tolkien gets this one right.

Did Tolkien consult PJ to make sure PJ was ok with everything, being it's PJ's story and all?

No. Bet if they could have, the two may have sat down together and hashed things out as it seems that we do here. (Note that in one universe, PJ's films are the basis for Tolkien's works as in that world, and only that world, does time move backwards.)

And most importantly which one of gollums personalities showed up for the marathon?

Exactly my question. What happens when Smeagol wants to go north and Gollum wants to go south? Because the two function so well as both two and one, think that PJ may have presented the creature accurately in that they have one body, one goal yet two means of getting there - kill Frodo and take the Ring, or help Frodo to some misfortune and pick the ownerless Ring off of the cave floor - which would be fitting and circular, as this is how Gollum lost the Ring in the first place.