"Before the Dream Turns Sour"

But he's frozen in a time trap, slowly losing power
Frightened if he makes a move, the dream will soon turn sour.

--David Brock/Michael Moorcock

Sometimes a good narrative and a reasonable amount of LSD, and some lush chords in the chorus, shazzam. "Sour," you know? It's a good word for a rock song and unusual.