well it's not easy to see in the video- its in sec.11-12.
the the nozzle is moving a step back and you can also hear it, this happens not regular, what is also shown in the photo.
i turned spiralized on, because i didn't wanted a z scar , and thats why my wall thickness is not 0.8 (with 0.4 wall thickness the wall is too translucent) i am trying to find another video, but its difficult to capture...