Recognizing Anger and Fear/Surprise, a young boy (MPEG, 1.0MB) .
Recognizing Anger and Fear/Surprise, an adult (MPEG, 1.8MB) .
For more details see
M.J. Black and Y. Yacoob, Tracking and Recognizing Rigid and Non-Rigid Facial Motions using Local Parametric Models of Image Motions, ICCV 95, 374-381.