Allen had been intent on pushing forward, even if it meant splitting off from the others, but that sound threw him off. If he was in human form he would have frowned, unsure which way to go next. On the one hand, they weren't certain anyone was down that way, and they may not be strong enough to fight anything just yet. On the other hand... what if there could be someone down there who could be hurt? Someone they hadn't heard yet?

"Let's go that way," he decided after a long pause, "We should stop whatever it is before it can hurt anyone."