There's an old pseudo-joke in writing that says if you're truly stuck, have ninjas suddenly attack. That way you've got at least a few pages filled, if with nothing else beyond your characters asking where the fuck did these ninjas come from.
Now, although I understand the underlying point of this concept, I still feel that it's a very stupid way of explaining said concept. There's a much better way to get to the same point, without such a tired cliché.
I'd explain further, but a bunch of pirates just burst through the wall, excuse me for a few moments.