Has anyone seen "Irreversible"?

I have a couple of questions about it-- Are we supposed to know the old man in the hotel room at the very beginning? The one that was released from prison? I know he isn't Pierre, but is he supposed to mirror him somehow? There was a lot of mirroring going on throughout the movie.

Also, what did you think about the film? About the way it was filmed and the scene sequence?
 
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