(Pick any of the characters to be! Crowley, Aziraphale, Adam, or Warlock, or your own character if you'd like.)
At the end of the summer at camp, Warlock and Adam—who had just found out they were brothers, twins, even!—traded suitcases and fixed each other's hair to make it look like theirs. Warlock mimicked Adam's English accent, albeit a bit melodramatically but it would fool anybody easily, and Adam mimicked Warlock's American one.
"Come on, dad! Let me show you the pool, let me show you how deep it is," both boys told the parent who had raised the other; Adam dressed as Warlock and Warlock dressed as Adam.
Coming from opposite directions, the boys guided their fathers to the edge of the pool. The men were barely able to catch a glimpse of each other before they were both shoved into the water, tinted blue with chlorine.