I bought a 3in vatf from rapps a few mths ago, and put him in a 55g. Well he's grown some and I decided that I would move him to a 75g. After I finally caught him with the net, he went bottom up and got stiff. At first I started freaking out, but then I remembered a thread West1 put up about it. I put him in the 75g and stepped back....almost immediately he went rightside up and started swimming around, lol. Its kind of scary seeing this behavior first hand, I wonder if atf play possum in the wild.