maybe half the time (framed_phoenix)

"Oh, I almost forgot," he said. "There's a really interesting rock formation, right as you enter the cave. I forget the exact scientific explanation, but there's something odd about the composition of the rock, so if you spread your hand out and touch it in the right spot, you can feel one patch of the stone that's about fifteen degrees colder than the rest of the rock. It's very bizarre. I'll show you where to touch as we're going in."