From The Grey House, Book One:
“Crap.” Charlie gave up the stealth and shoved the door open. He turned on the light as he walked in and then stopped. Something crunched under his boot. Backing up carefully, he looked down and became angry and scared. He had stepped on her already broken cell phone. He knelt and touched the pieces. Had she tried to call for help? Her phone was completely dead; he couldn’t even turn it on.