They tried to contact him and failed. Sloth and others used their spirit senses and got to see the tunnels collapse and blocked by tons of rocks. They saw everyone safe inside the deep caves, but there wasn't a single trace of William anywhere.
"You are really a troublemaker!" When everyone found paths to the surface, his friends and girls came, hugged and cried, and even a few shouted at him in distress and worry. William met all this with a big smile and laugh, knowing that they did all this because they were extremely worried about him.
Sloth punched him on the shoulder while looking at Anjie who was now leaning on William's chest, before adding, "you have to consider others who truly care for you before doing anything stupid again."
"I need to keep testing…"
"Not that bullshit again!" Sloth got fed up with him, "I won't accept this madness without proper explanation!"
"Listen, you know I won't persist unless there is a reason…"