Flip flops happen on most planes; I've seen P-47's occasionally do it.
it happens when someone is flying on the verge of a stall and rolls a lot. Add a little rudder and it might come unintentionally.
Now, because of the "prediction" algorithm in online games (thanks Assassins for informing me about it
) if you add a bit of vertical, you can intentionally get the flip flop thing, even without being near stall speed. I have a few films of it happening where I KNEW the pilot would flip flop and thus turned on the camera just as I engaged.
Sometimes a stall roll thingy (proper name anyone?) can seem like a flip flop, but a flip flop is change not only in roll, but also in another direction.
Flip flopping maneuvers appears to be e demanding - it's a method some use to get the other guy to overshoot. The suggested solution of slowing down works quite well - but sometimes you either cannot slow down more and don't have the energy to go up one single millimetre. The spray n pray method might yield a result as the distance then is quite short.
I agree with Zigrat about the negative g moves - often the people wjho flip flop use the negative g move - which suggests that they are linked in a way. It's really beating the "don't move your controls so rapidly" algorithm, taking advantage of some form of unidentified weakness in it.
Pump 'n dump maneuvers as I like to call them
should result in 30-60 seconds of redout, simulating the bursting of every small blood vessel in the pilots eyes. In fact, overall I think it'd be a good idea to have a longer redout time; blood vessels bursting in yer eyes don't go away in .50 of a second.