why the ? are you not sure? ;-) nice switcharoo on perspective. possibly a touch too glistening - maybe due to sharpening. shadows alongside nose a touch harsh.
Ah, very cool. Reminds me of a study I read about where they showed people pictures they'd altered the same way you did this, with the mouths and eyes right-side up in an upside-down face. Folks thought they looked normal. Try it with a smiling face - it still looks pretty normal in the upside-down view, but right-side up it's grotesque!