I'd say that's what happens when you really crank up your concentration while you are in EQ

Depending on whether you experience other phenomena at the same time (and what those phenomena are), your 1st point
might be an incomplete description of 5th or 6th jhana.
Anyway, just more phenomena to be objectified. And the reaction to it is just another phenomenon to be objectified. And your judgment that you are in EQ is just another phenomenon to be objectified. And the attempt to explain and understand what it is is just another phenomenon to be objectified.