And Mel's 'ledge' appears to be a piece of stone that was just a little too hard for the person carving it, although deep cracks have been left by the attempt to remove it. And in the light, seems a lot less sturdy than it felt.

She holds the flashlight in her teeth and leaps down lightly onto the floor, facing the tunnel ahead of them.

"Well, if I were going to get out of here, that's the way I'd take," she says. "Think it's too obvious?"

Why Rachel saw fit to take her clothes off, she doesn't ask.