Watch the point-light walker and decide whether it faces toward you or away. The moving joints form a clear walking figure, but the 3D optical illusion may flip its facing direction and spin. Follow one shoulder, then switch to a foot and try again.
Music: "Healing" by Kevin MacLeod (incompetech.com), licensed CC BY 3.0 US. Excerpt trimmed to 30 seconds and mixed with this video.
Source: https://commons.wikimedia.org/wiki/File:Healing_(Kevin_MacLeod)_(ISRC_USUAN1200048).oga
License: https://creativecommons.org/licenses/by/3.0/us/deed.en