Story playing out on Reddit: Person A in Iowa owns a pet lobster that likes to play with a small plastic Dratini.* Person A is forced to give up said lobster when moving to Arizona.
Person B moves from Arizona to Iowa, purchases pet lobster from a store whose employee refuses to let B do it unless B also takes the lobster's pet Dratini.
Person B posts a photo of the lobster and Dratini to Reddit.
Person A shows up in the comments.* A Pokemon.