My two cents (And a theory I haven't seen here yet.)
I have seen a lot of people claiming that Anna lied, to get revenge on her captors, but I don't see that as plausible at all, it would have to be a whopper of a convincing lie to speak to someone for an hour and basically saying, "there's nothing."I very much doubt that someone who has been tortured for who know how long, skinned alive, etc. would be coherent enough to even care anymore. Lucies ghost-voice tells her to let go, and that's exactly what she does. Lets go of everything, sanity, conciousness, etc. She retreats so far into her mind that she eventually "trancends." This has happened to real torture victims, they often talk about going to a place in their mind to hide, and many have gotten stuck there for a long time before regaining any semblance of conciousness.
And I have seen the theory that she told the Madam that the afterlife is wonderful, and she just can't wait to get there, so she waits until her cult is gathered before killing herself, something that probably took a few hours, seeing as the house is in the middle of nowhere. And then Madam is a giant bitch, so after gathering everyone, she just gives them the middle finger and says, "HA, SUCK IT BITCHES! I KNOW SOMETHING YOU DON'T KNOW! AND I'M TAKING IT TO MY GRAVE." Well that theory just doesn't sit right.
My theory is that Anna "trancended," saw the afterlife, and told Madam exactly what she saw. And I think it was so believable that it would be impossible to fake. Madam said she was crystal clear, which to me indicates that it was utterly convincing. But it wasn't an afterlife she expected. She can't even process what she's heard at first, and once she does, there's a man knocking on the door asking for answers. But she can't face the crowd with what she's just learned, and she can't lie to them either. She also can't live knowing that she's spent her life searching for an answer she really didn't want. She starts removing her makeup, because she wants to die as herself, what's the point of hiding. (And it reveals her motivation, as she does look deathly ill under the costume.) Then comes the question:
"Can you imagine what comes after death?"
"No. I..."
"Keep doubting..."
And then she shoots herself. I don't see this as sarcasm or nothing like that. I consider it a warning.
"You can't even imagine what I now know, and it's best for you if you never do."
At least that's my take on it, thought it was an ok movie overall, and unlike some other sub(machine)s here, I am very open to discussion and critisism, as long as you keep it civil of course. Now I'm gonna try to get my friends to watch it and see their take on the entire thing.