Stumbled upon this in Carl Jung's Autobiography and it's fascinating
Carl Jung got KO'd as a kid and had fainting spells, but realistically, he ALLOWED them to happen. When he decided to not allow them to happen anymore, they put up a little resistance, he fought through them, and then realizing the futility in this, they went away and never recurred again. He also says he gradually "saw clearly that I myself had arranged this whole disgraceful situation. That was why I had never been seriously angry with the schoolmate who pushed me over. I knew that he had been put up to it, so to speak, and that the whole affair was a diabolical plot on my part." Our boy Carl legitimately manifested this to happen so he could spend more time out of school and in nature. @Mike Bogucki will argue with this manifestation as it's not scientifically proven, but who's more qualified to discuss this than Carl Jung?