Oliver waited outside for a while, thinking about all that had happened. He had no special abilities to fight whatever these forces Jenna was going on about, and she shot down every suggestion he gave. He was wondering why he was even there. He considered just leaving, getting a bus home and forgetting about all this. But his conscience wouldn't let him. He kept thinking about that injured girl he opened the door to one night.
The girl who had dragged him into this mess and wouldn't let him out of it, or even help with it.
He saw her come outside and say it was time to leave, then he just followed after her. He was already carrying everything he had.