Still A Couple Of Tasks Ahead
John is obviously the type of person who thinks ahead. He knew that when he was finally, at long last, able to enter the mystery structure in his backyard he needed to be able to see. Many people would just rush ahead with a flashlight, but not John.

So he installed an electrical line that would allow for the space to be illuminated. He and his friends could also use power tools down there if necessary, once the electrical line was complete.