No idea what the old ladies are making an issue of in this thread. One more time, here's my post from a few years back:
Mosconi did not use a slip stroke as in: for the huge honking majority of shots he shot he did not use a slip stroke, but it was a technique that maybe he used very, very rarely. That is borne out by the video and by the hundreds of shots eye-witnesses saw him shoot. And please don't talk to me about eye-witness accounts being faulty because we're not talking about a quick, flash of the eye, smash and grab, one time incident -- we're talking about knowledgable folks watching *one guy* play over and over again.
It would be like me putting up a gif of the one shot in a hundred for which Mosconi shoots left handed and saying, "Ah ha! Willie Mosconi was a left-handed player!"
The equivalent thing to what you are doing is to say (after watching him shoot left handed); "Oh, he didn't really shoot left handed, he just accidentally lost track of which hand he was holding the cue with". Also it would be foolish to downplay the fact that he knew how to play left handed. It's an extremely important skill to posess at the highest level and may make the whole difference between winning and loosing. The frequency with which a technique is used is a very questionable indicator of it's importance in pool, where most shots are simple ducks, and many matches are decided by a single miss/make. Well, somewhat obviously, no he wasn't. But it was a technique he sometimes (rarely) used. And if you take the time to actually read my years old post above, I've highlighted (for those with comprehension issues), that I was saying a loooooong time ago, "...maybe he used a slip stroke" on a very limited number of shots. Make up your God damned mind, will you! Did he use it or not?! There is no maybe. The video is there to prove it. Of course you know the answer to this allready. He did use it, and he knew exactly what he was doing because he was Willie Mosconi.
But frankly, I think he was just adjusting his grip ;-)"..ajusting his grip.."....OMFG!
Lou Figueroa