Aidan Keller: She came looking for me. That means she loves me.
Aidan Keller: Let's watch some TV together.
Rachel Keller: It's kind of late, Honey. Don't you think you should sleep?
Aidan Keller: I never sleep.
Rachel Keller: Then let Mommy make you something.
Evelyn: It was you! You did it.
Rachel Keller: What did I do?
Evelyn: You let the dead get in.
Evelyn: They don't dream, you know. The dead don't dream, and the dead never sleep. They wait, they watch for a way to get back. My baby told me to, just like yours will tell you, and you have to do it. You have to send it back. They stopped me. Don't let them stop you. You have to listen to the voices. You know what they did? They let the dead get in. They let the dead get in.
Aidan Keller: Mommy, I love you.
Rachel Keller: I love you too, honey, but you're not my son.
Answer: I was wondering the same thing. My guess is that it was when the water encircles his feet.