John Scotram, a self-proclaimed prophet, believes that he is the angel Gabriel. And he claims that Jesus is coming again on May 6, 2019. UPDATE 5/14/19: He didn’t.
The SDA Church has spawned many small groups of terribly earnest believers, some of whom interpret their breakaway from the parent church as fulfillment of Bible prophecy. They become, to themselves if not to anyone outside their insular bubble, the One True Church. Ever since the SDA Church made this claim about itself, it has spun off innumerable tiny congregations, which then make the same claim about themselves.