"No, wait. Wait, wait, wait. Wait, the air. The air shouldn't have... Nikki, I didn't tell you..."

He'd gone. That had been their last goodbye and now she'd do anything to hear his voice again, see him. But it wasn't her choice.

She expected to see her mum, hear her, but instead she heard Jack's voice again. She remembered his words. She knew what he was going to say.

"Nikki, I didn't tell you this, but the air, you should have..."

And that was that. She had asked his permission to let her go, let her die and he had refused to give it. All thoughts of imminent death disappeared. She had air Jack had given her a lifeline and now she was going to make sure she got back to him.