Because we had zero G conditions in the aircraft, I assumed that both the occupents (us) and the aircraft were experiencing a downwards acceleration of 1g and therefore the aircraft had a load factor of zero. i.e. it was free falling.
What? By your own statement, things were floating around the cabin, so I don't think your statement is correct. I was actually going to use the word "hogwash", but I figured that would be a bit too emotive for this forum.
Are you trying to clear your conscience?
In absense of a gauge, you will never know exactly how much negative "g" you were pulling at the time. I suspect that the aeroplane could've been overstressed by that manoeuvre so, it's probably an accident looking for somewhere to happen. Or has the accident already happened?
I hope not.