Well, Charles, you've done it again. Your answer(s) evoked so many associations that there's no way I can reference them all.
Ah the "swallow cut" - The last of the Musashi trilogy staring Tojiro Mifume. The opponent is talking to the "love interest" when he makes a sudden move and resheiths and the love interest is saddened by the death of the swallow. Lots of historical inaccuracies in the trilogy, but what can you expect in a movie?!?
At the height of European dueling there were many schools offering to sell the "SECRET MOVE". Of course no one ever claimed the money back guarentee
To make a football analogy...
John Madden: "Those short little J-Hook passes are almost impossible to defend."
True, but if you do defend them you leave yourself open for the long pass down the field to score.