Hmm I have never heard of your version Volvord, i do not mean to contradict you and please do enlighten me and correct me if i am wrong,
But the way i know it is that when you let up on the gas, the anti-lag system will keep a butterfly valve about halfway open, so when your foot is off the gas but fuel is still coming in, the cycles won't be timed properly which results in a purposeful misfire, dumping semi combusted fuel into the exhaust manifold to "feed" or spool the turbo.