Thomas heard the snapping sound too. "I know, I know," he said as he waved off Newt. He shook his head and then moved the phone away so Teresa couldn't hear them. "No, we're heading back to the hotel. Just like I told Teresa to do." From the messages he read on Newt's phone it seemed like whatever that monster was it didn't follow. So, the hotel seemed like the safest bet.
"Get into the hotel. We'll see you there," he told Teresa before he hung up and put the phone away. "Come on, let's not hang around here anymore." He took one last look around before he took off back towards the hotel.