OK, given your last response, I totally agree with you, and want to dismiss fuel as the cause of the no-start. The FPR would only be a suspect in my mind if that puff you felt was thought to be vapor. And this wouldn't be a problem starting cold. Wet plugs (wondering how wet) dismiss that too, or point to a possible flooding condition, which I think you are experienced enough to detect with your nose and foot down on the pedal.

That leaves spark. Is it still occurring? Is it occurring at the right time? Maybe, if you can, set up to crank from under the hood, so when it happens next time you can get your timing light on it and catch it NOT firing at TDC during cranking.

As to the cause, I have had a suspicion for some time a gob of green goo corrosion in a battery cable could cause the starter to drag the voltage low enough to reset or confuse the EZK during crank time. You'd still have spark, perhaps, but timed ineffectively. A jump wouldn't reveal this, and it might take a good ear to detect it in the cranking rhythm. A timing light would catch this.
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Art Benstein near Baltimore

There's no worse feeling than that millisecond you're sure you are going to die after leaning your chair back a little too far.