lifters may throw down ions but whats for sure is that they dont through air down since its been tested with smoke and you could see clearly it didnt send any air down
So the video clip on this page must be a fake then?.....
http://www.americanantigravity.com/smoketest.html
Quote: "Smoke testing for the Lifter technology demonstrates a pronounced effect on nearby air-molecules by the electric-fields present in the LIfter's air-gap during flight. These fields and associated high-voltage charge transfer through the air create an airflow in which the direction of air-movement is down through the vertical axis of the Lifter, creating an upward thrust along the center axis"