The general idea here is the same as before: see the queen-behind-rook pattern for White, this time running in the other direction; notice the Black queen, poised to be taken by White’s queen if the rook can move out of the way with check. Here the rook’s check probably is of its most common type: the move to the back rank, in this case with Re8+. The check easily is defused with RxR, but then White wins the queen with QxQ.