Another room
After bashing the padlock a few times, finally, the door busted open and the three men entered inside. James was clenching his fists, he had no idea what to expect and whether or not something was going to attack them from out of nowhere. When they all rushed inside, their jaws dropped.
They had clearly walked into a large space, it was not an entrance to the tunnel, it was another room. But they couldn’t see anything because it was pitch black. There had to be a light switch somewhere, so they scanned the walls looking for one. Finally, they found it and turned the lights on.