Okay, I shook it some at 40psi, then cranked down the pressure and shook it some more.. could hear it foaming up in there.. and suddenly, beer started moving up the gas line.. So I panicked a little and stood the keg up and pulled the pressure relief...
well, that stopped the beer moving up the gas line... but it also got me a face full of foam.. So I attached the party tap, and turned it upside down.. The beer started moving up the gas line again, so I turned up the pressure till it went the other way.. This was about 26 PSI... evidently the beer has some carbination in it... LOL
So then I started the trick of opening the tap into a glass with the keg upside down... you could hear the gas moving through the beer.. big bubbles...
I kept repeating this as I turned down the gas until I got to about 14 PSI and then I just went through the opening the tap and waiting for the bubbling to stop process about 5 times..
I think it's actually carbed 14PSI right now, otherwise it would be pushing beer up the gas line... or raising the pressure on the regulator.. which it's not..
So I'm letting it sit upside down for a few, and then I will gently turn it right side up and let it sit for a bit.. then see what comes out... All of the foam I've captured is settling into 'very' cloudy beer.. but that's to be expected.. I just shook the crap out of it... and any sediment is now resuspended..
In any event.. I think the beer is carbed if not conditioned at all.. and will be ready to drink depending on how much sediment I'm willing to put up with from it.. And even that should be largely dealt with by this time tomorrow..
What a great trick.. How many times have I just 'dealt with it' when I've over carbed a beer? Do more.. Now I know how to 'fix it'..
And if I want to put the stuff together at some point, I can do it right side up...
Thanks for the tips.. Will report back later how it actually tastes...