Inception2010

[After Ariadne is stabbed by Mal in a dream, she wakes up gasping for air]

Arthur:
Hey, hey, hey. Look at me. You're okay. You're okay. Hey

Ariadne:
Why wouldn't I wake up?

Arthur:
Cause there was still some time on the clock. You can't wake up from within the dream unless you die.

[Cobb wakes up and immediately heads to the bathroom to check his reality]

Cobb:
She'll need a totem.

Ariadne:
What?

Arthur:
A totem. It's a small personal...

Ariadne:
That's some subconscious you've got on you, Cobb! She's a real charmer.

Arthur:
Ah, I see you've met Mrs. Cobb.

Ariadne:
She's his wife?

Arthur:
Yeah. So a totem. You need a small object, potentially heavy. Something you can have on you all the time that no one else knows.

Ariadne:
Like a coin?

Arthur:
No, it needs to be more unique than that. [shows her a small red die] This is a loaded die. [Ariadne reaches for it, he pulls his hand away] No, I can't let you touch it, that would defeat the purpose. See, only I know the balance and weight of this particular loaded die. That way, when you look at your totem, you know beyond a doubt that you're not in someone else's dream.

Ariadne:
I don't know if you can't see what's going on, or if you just don't want to, but Cobb has some serious problems that he's tried to bury down there. And I'm not about to just open my mind to someone like that.

[Ariadne leaves as Cobb comes out of the bathroom]

Cobb:
She'll be back. I've never seen anyone pick it up that quickly before. Reality's not gonna be enough for her now, and when she comes back....when she comes back, you're gonna have her building mazes.

Arthur:
Where are you gonna be?

Cobb:
I gotta go visit Eames.

Arthur:
Eames?...No, He's in Mombasa. It's Cobol's backyard.

Cobb:
It's a necessary risk.

Arthur:
There's plenty of good thieves.

Cobb:
We don't just need a thief. We need a forger.