I'm not sure if the twist in Haute Tension needed any great significance or emotional depth - though having said that, the shock was that the supposed hero of a stylish gorefest/suspense movie was in fact an utterly demented psychopath. The shock factor is made all the more jarring in that an attractive young woman has imagined herself as a filthy, brutal middle-aged man in order to justify her killings.
The audience might not have wanted this be so, such was their anticipation of the usual 'payoff' ending nicely wrapped up, but this is what they got. Very confrontational and subversive of the writers/director, and very commendable for their bravery (I bet this one split their investors like Marie's personality).
The film's comparison to a book is not really relevant.
__________________
|