oh snap i just remembered another mind bang moment from claymore..
when teresa spares priscilla, priscilla uses too much of her power--she can't turn back into human form.. she begs teresa to kill her while she is still a human.. teresa looks down at her. and .. holy shit, you just don't even see it coming (i didn't anyways), someone's head gets all chopped off..
marinchin said: I agree, any part of perfect blue is pretty mindfuck, also in mindgame the whole part with the gun up-the-you-know-where is pretty strange....
yeah, that part in mind game is totally mindfuckedup. the whole god thingy is also really a mindfuck (and many MANY other parts from that insane movie).
also, in paprika...
... when she is stripped of the "paprika" personality by the weird guy that "loves" her... that was one mindfucking scene.
as well in aoi bungaku...
... in the first arc (i think it was episode 1 or 2) when a strange guy tells the main character that he`s a monster in fact O.O that was kinda of a mindfuck. plus his obsession of drawing "his true self" is wicked
I felt mind-fucked after I watched Denpa Teki na Kanojo today. One particular moment was probably when Satsuki approached him with a bat in the first episode, or the one-sided conversation between Shiraishi and Ayase in episode 2.
However, that's not my favorite.
It's already been mentioned, the 12th episode of School Days. That was my most enjoyable moment of mind-fuck, thus my favorite. Laughing and crying at the same time doesn't happen often.
EDIT: If it doesn't have to be manga or anime related, then I'll say Salad Fingers. The whole series. Whew. That's the guy in my avatar.