Black Swan

EDITED TO ADD: I just realized that there may be some spoilery things in here...so be careful. But really, you shouldn't be reading this if you haven't seen the movie yet. "Maybe it was all that White Swan/Black Swan split-personality stuff, but as Black Swan ended I found myself confronted by two outwardly identical but attitudinally opposed thoughts: "That was something... (?)" and "That was something... (!)." In other words, I can't yet tell you exactly what Black Swan is, exactly what it means...