Not sure what I missed.....Bernoullies law states that faster moving air.will have less pressure but that.is.in reference to.the pressure BEHIND the air column not in front....as speed(velocity) of an object(air) increases so does its inertia.....as MCA decreases velocity increases...pressure drops behind(vacuum signal at venturi) but inertia of the column as a unit increases and probably at something.like with.the square...