[HairOfTheDog]

see above.... the car is gone... It zoomed from right to left across screen in the road visible in that wide shot.

It is just a bird's nest in the Argonath eye, I think.

[My back yard]

I thought too that it was just a bird nest or something. But when i enlarged it on this big screen it did look like gollum's big head and gangly legs and arms, stretched on all fours, head on the left and big feet on the right. But at best it was an obscure image of him. Coulda been a nest.