Jack turned as she cried out, just catching someone nearly running into her. They walked past him too, and Jack could have sworn the edge of his shoulder passed through the man's. He barely noticed when the doors opened because she had gone invisible too, he was sure of it. It was suddenly hard to breathe again, but it wasn't a choking feeling like earlier. It was panic. His heart was pounding in his chest, but, no, that's wasn't quite right, it was more like a phantom pain, a memory of a feeling, and that made him even more afraid. "It's not me," he said finally, his voice low. "Something's going on. I don't-" He shook his head. How do you explain to someone they you're not entirely sure you still exist?
Or maybe this was all a nightmare, but it was one he didn't know how to wake from.
The doors were open now though, and he just wanted to be inside and he ducked through without waiting for her, afraid they would close on him and crush him. "Hurry before they close," he urged. The doors hadn't sensed them. They wouldn't stop closing in for them either.