I would actually posit that it would be less luck than you may think. Using air to blow lighter objects off line is a fairly common tool, even going as far back

I would actually posit that it would be less luck than you may think. Using air to blow lighter objects off line is a fairly common tool, even going as far back as separating wheat from chaff, and if you have a guy on the floor with a little experience it probably would have been somewhat obvious to them