The ninjas have an off day and are a little bit more clumsy than normal.
Due to their massive number they wind up injuring and even killing one another. Prehaps even having a temporary lapse in judgement and getting mad at each other for some nicks and scratches. . . this leeads the 52,000 to eventually start fighting amongst themselves.
And eventually they start trying to prove whos the best till only one is left. But this one is so badly injured its a cakewalk for Longshot to take out.
What do you think? 🙂