An Imaginative Plot Twist or "Cheating?"

Ok, I used that word "cheating" mainly to get your attention. There is no such thing as cheating in fiction, right? Anything goes. But then again ...

Writers often have trouble with plots. They develop a scenario and then, for one reason or another, can't figure out how to resolve it -- how to bring matters to a conclusion, or in the case of many short stories, to a satisfactory finish since conclusions aren't all that common.