#notFACS indicates actions I have identified and coined that do not exist in FACS. Due to FACS’s original purpose as a facial behavior identification system, FACS lacks documentation for some finer, more nuanced facial movements. To fill this void, I have further defined my own nonFACS movements such as: vertical lip tightener, y-axis dimpler, open-eye blink, etc. If you work on lipsync technology or photoreal characters, these distinctions will be particularly useful.