"Look," Martin said, "I can make a nice boom and blow up all kinds of dirt from that hole, but no one is going to be in it when I do."

Myrna smiled brightly at him.

"I'm sure you can do it safely," she said as if she hadn't heard a thing he said.

"No one is in the hole when the charges go off," Martin said.

Myrna stopped smiling. She pulled out the radio that she had at her belt.

"Hi, Bill," she said, "I've got a teensy problem with the shoot here. The pyro guy ...