How many books did you read in which the situation looked as worse as it possible could be for the hero and even then he manages to escape in a ridiculous way by the help of a unknown powers? Certainly you read that at least a hundreds times and that only in this year. These moments are not only bad for the credibly of the story but that situation also bury the chance of develop the character through a dramatic scene or kill of unneeded characters. The method is practically found everywhere and is called Deus Ex Machina.
[Picture by Praetoris01]
[Picture by Praetoris01]