Catching Fire, pg. 391 - 392: “Tick, tock,” Wiress says in her sleep. As the lightning ceases and the blood rain begins just to the right of it, her words suddenly makes sense to me.
"Oh," I say under my breath. "Tick, tock." My eyes sweep around the full circle of the arena and I know she’s right. "Tick, tock. This is a clock."