At first glance, you might think this clip is a backstage peek at Lady Gaga rehearsing a new routine – something involving a demon mask and simulated impalement. (You know, typical Gaga stuff.) But believe it or not, it's even creepier than that.

The disturbing dancer is actually a sophisticated robot, designed by artist Jordan Wolfson and brought to nightmarish life by robotics company Spectral Motion for an exhibition at New York's David Zwirner Gallery.
If you watch closely, the dancer not only modifies her routine as patrons approach her, but through facial recognition technology, she's also watching them... remembering... patiently waiting. If not for the metal tube (a combination control arm and circuitry conduit) that impales her torso, who knows where she might wander by night?
Actually, she may want to visit the home of artist Suzanne Heintz, who has been living with a family of creepy mannequins for 14 years...