In this video recorded at the reputedly Stanley Hotel in Estes Park, Colorado at a Darkness Radio event, researchers set up a Kinect motion-sensing device with an infrared camera. The set-up apparently depicts people its aimed at as stick figures, and it does depict a woman sitting in a chair as a stick figure. However, it also rendered a small, child-sized figure in the "empty" chair next to her. So what is the Kinect picking up?
There are some unanswered questions about this video and very little detail provided. Go watch it.