This is the same thing I have been mentioning in my post about the dipstick blowing out.
From what I have read on Corral, if the PCV is relieving the crank pressure, air from another open source will be drawn in. In my case, I have never seen/heard it so much out of the oil dipstick before. But then again, I plugged off the air that was sucking through the hose on the oil filler neck, and I removed the breather, so I guess air wants to enter from somewhere else.
RC