Need a head turn animation synfig file for study

I want to see how a head turn works. You get the 3d look which is what I want. Anyone have a file for me to study? It would be greatly appreciated.
Unfortunately I don’t have (found) the sources.
In general slow head turns are unrealistic. They are only needed for testing purposes. Much better to make quick head turns with good anticipation and poses: viewtopic.php?f=7&t=1088