Organization- Drugged Lake

She tried to take a deep breath before she entered the water, but she was laughing too much. Beside her she sensed Holden flying with her, and then the water closed completely around her. And it was colder than she had ever felt before.

Surfacing, gasping, spitting water from her mouth, it took her several seconds to find her breath.
...

Curt and Jules were wearing their bathing suits, while Marty was still in his tee-shirt and shorts. He had a towel slung casually around his neck, but he seemed to have no intention of joining them. Right then, she could hardly blame him.

“Does it seem fresh?” Jules asked, voice etched with concern. “Lotta funky diseases sitting in stagnant lake water.”

“What?” Dana asked, “this water?” And to emphasize her point she took a deep gulp of it, swilling it around her mouth before spitting it out in an arc. Cool and fresh, it was tinted with a tang of something wonderful. “This water’s delicious.”

“Oh my god, she’s right!” Holden gasped. He took a mouthful too, spitting it in an arc toward Dana. She flinched back and it splashed her shoulder. “It tastes like… vitamins. And hope.”
...

Dana laughed, and looked up at Marty standing alone on the end of the dock. He eyed them all warily, holding the towel splayed around his neck.

“Marty, get in here!” she said.

“Nah, man. I’m cool. Just seeing the sights.” He sat on the edge of the dock and dangled his feet, his bare toes just reaching the water.

- The Cabin in the Woods: The Official Movie Novelization, chapter 3