Ha! I think I'm
not confused.
I don't think the ping pong ball floating on the vacuum cleaner hose is Coanda Effect. Possibly Bernoulli.
The reason I say that I understand that Coanda was trying to put an afterburner in a piston engine exhaust. Adding energy to the exhausted air. It seems to work better with a turbojet.
Another possibility is Shauberger's trout submarine.
