Auron arrived outside of the dungeon. He was greeted by a group of crowds. Auron was confused. Then, he realized that the group of crowds was surrounding his group.
Auron approached his group when he heard a series of questions, "What happened inside? Why did it take long for your group? Were you triggering a secret level? How to trigger that?"
It turned out the reason these people surrounded Auron's group was that it took too long for Auron's group to finish. Auron's group had been inside for more than 2 hours. It was more than the time limit that the people had known. Hence, these people had known that there must be something going on for Auron's group to spend more than the time limit.
Ainsley, the first one who came out because she died, had already told them that they had entered a secret level. She also had explained to these people that she didn't know what the trigger was.