Not true.
If whatever the object is sitting on has a dip or dent, and the object is not uniform (it's not - it's got a figure carved into it for a start), then the object's centre of gravity will tend towards the centre of the dent, and any slight movement will necessarily rotate the object slightly until the heavier side of the statue is facing the dent (at which point there's another slight movement and the heavier side is no longer facing the dent).
Again, I ask the question (this time slightly differently)
Why does it rotate on the spot?
Your explanation above might explain why it rotates, but there would still be some off center movement, yet the statue in the video rotates
exactly on the spot, it doesn't move sideways at all ... not once in any frame. Examine it for your self
http://youtu.be/q-jqMcKH4ZI
To follow your explanation, it would turn off center, and then turn again, off center. If the uneven base is in the exact center the statue would not turn.
AND
Another question arises ... why does the statue turn to face the wall
AND THEN STOP?
Your explanation would have the statue continue to turn (and don't say people were not walking past, watch the video again)
OK, I have watched this video several times now, and I've noticed a few things :
- The statue only turns during the day
- The statue turns when people are walking past it
- The statue turns when people are not walking past it
- The statue doesn't turn when people are walking past it
- The statue doesn't turn when people are not walking past it
- The statue stopped turning when it faced the wall
So, uneven base + vibrations causing it to turn? Sorry, I don't think so.
I still say, motor in the statue or Egyptian God.