She gives him a look, because there have been some things that should be only dreams, made quite real.

"Temporal anomaly," River said, with a pinch between her brows at her inability to better explain it. "They say time freezes. I was here, then I woke up back on Serenity in the same moment. Relativity of simultaneity. Two things that can't exist in the same time and space, but they do."

Then she takes a closer look at him. Around her neck is a blue and green gem. "Simon. What did you do?"