I only noticed one day while brushing my teeth never saw anybody else do it before
I've always been pretty good at snake spitting. It's just a matter of figuring which tongue muscle movement compresses your salivary glands in the bottom of your mouth. I can usually do one really good one, but not again for a while.
I had oral surgery for gingivitis (get your teeth cleaned often by a good hygienist, people! You can't do it all on your own!) a few years ago and that's some pretty serious stuff they have to do. They put several shots into the major nerves in my mouth and there are some residual effects to the various nerves, apparently, which last for days. Even the motor nerves were affected to a degree.
I found that I would just be talking normally and I would snake spit a couple of feet, without trying to at all. It continued to happen for several days after it seemed that the shots wore off. Of course I talked a little oddly during that time, too.
The spitting bit is funny, now, but at the time it was actually quite embarrassing.