A character plays a small and/or unlikely but crucial role in some horrible development. The character being put on task, meanwhile, only serves to bumble in and botch the hero's hopes of a surefire victory, and worse, quite possibly deprive the story of its Happy Ending, all the while often remaining oblivious to the overall implications of the situation and their role in it. Their actions have no real necessity in elevating the drama, often taking it to Beyond the Impossible levels, making them a walking Diabolus Ex Machina. Examples of Unwitting Instigator of Doom include: