The sound of the crystal shattering made Yamato's stomach tighten and her back cramp. She grimaced and rubbed her lower back. She sincerely hoped that the cramping wasn't an indicator that she was about to have another bout of diarrhea; she had learned her lesson the first round and vowed never to eat lactose again. This wasn't exactly an urban island, and toilet paper (never mind actual bathrooms) would be an impressive find.
"Let's hurry back to the helicopter." She ducked out of the cave and into the cool evening breeze of the island. "We're running out of daylight, and I think that ice cream is plotting its second attack on my lower intestines."
The pressure eased up as they trekked back down the rocky path, and Yamato began to think maybe she'd imagined the cramping. They made it off the mountain in good time, but as they neared the base of it the cramps returned, accompanied this time by strong leg spasms.
"Are you alright?" Kosaburou grabbed her hand to steady her.
"I think," she bit her lip, "It might be time."
Kosaburou blanched. "You mean for the baby? Here? Yamato, wait!"
"I'm trying!" She sat down on a soft patch of ground. "If we can make it to the helicopter before it gets completely dark, I'm sure we'll be alright."
She rested for a moment, then he pulled her to her feet. "Come on," His voice was tense with urgency. "We're running out of time before it gets dark."