i live for this sort of thing. the last headfuck for me has been sally shapiro's hold me so tight. near the middle of the song the synths take over and elevate into bliss-space, really transcendent and wonderful in a stars in the desert night sort of way. it's such a simple mechanism, it's almost absurd, but it works! i'm completely transported every time. and just as soon as this happens the synths come down and i'm back with sally's isolated voice. perfect.