NoGoals wrote:

A stalled wing can still be moving forward, even as it falls toward
Momma Earth. Also, in a spin don't you always have one wing rotaring
around a point defined by the lower wingtip? The smoke in the above
example acts exactly as I would expect it to.

A stalled wing is one in which the airflow has separated from the upper surface
of the wing. It may indeed still be moving forward. Blow smoke across a stalled
wing and you can clearly see the burble in the airflow over the surface. Smoke
generators at the wingtips will not show whether a wing has stalled or not.

George Patterson
Why do men's hearts beat faster, knees get weak, throats become dry,
and they think irrationally when a woman wears leather clothing?
Because she smells like a new truck.