A random middle aged man in his office shirt, let's call him Bill, is currently sight seeing in a local museum.
No good karma or saving the world or saving a person who ended up saving the world kind of thing, but it just might have been his destiny all along. An encounter at a right moment and at a right place, it could be anyone , might be Mark his friend, but it just happen to be for him.
As Bill walked into the main section of the museum, he accidentally saw a big statue of a Big Cup, the cup is not beautiful from his point of view, but there's just something that attracts him to it.
Bill noticed that there're some words on it, and when he recited the words in it, coincidentally, there's an earthquake , the cup fell into his hand and suddenly he's vanished from his world.
No random omnipotent being, no white space, it's just all black. Bill's consciousness is fading away until it turn to nothingness.
Several months later, tiny consciousness started to be regained, Bill's finally able to sense things. He found out that he's just born as a baby.
No memory recollection of the past yet or any intellectual enhancement, he just have the feeling that he has gone through this phase.