I only recently discovered the band Steam Powered Giraffe, a group of people pretending to be 19th century robots, and particularly in some of their older videos, they sometimes appear to enter the Uncanny Valley from the other side, by moving in a robotic way that's simultaneously fluid, but also appears slightly non-human.

I guess this might also be the original attraction of robotic dancing, but for the most part we're used to it. But SPG seems to demonstrate that you can still get that uncanny eerie feeling if you do it in just the right way.