Charlie came back to life. He stretched out. He felt so good. He had forgotten what it was like to be young. The only problem was he was going to lose the best friends he had ever had. Charlie and Verne were like brothers to him. And, not only was he unable to tell them he was still alive, but they would die, too, eventually. Probably not too long from now.
That's when he made his decision. He would bring them along with him. They would live life over again. And after that they would do it again and again.