the situation reverses itself; the table is turned; the shoe is on the other foot
turning things around with a home run; turning the tables with a single successful attack (move)
dramatic turn-around; major reversal; great comeback; game changer
one's days and nights being reversed
winning after defeat seems certain; coming from behind to win
upset victory; come-from-behind victory
regaining the lead; turning the tables (again); second reversal
a complete turnabout via a single blow
population inversion factor
geomagnetic reversal; reversal of Earth's magnetic field