It was just a small walnut bowl, about 3" diameter x maybe 4" high.....not much of anything, really, except a bit of interesting spalting in the creamy sapwood. It was rough turned a few months ago and I was finish turning the outside using a Talon chuck and a 3/8 gouge. No tailstock support. Tool rest up close.
I had just started a very light shear scraping, presenting a near vertical edge...about 1200-1400 rpm's and the gouge must have hit a tiny crack or something and then whamola. Hit me square in the face....hard. Eye level. Hard enough to knock my head back...whiplash style. Like they say in the martial arts "where the head goes the body goes". It nearly put me down. Pretty amazing for a tiny piece of not-much. I still don't get the physics of it. Mass wasn't nothing, must have been the square of the velocity.
Good thing I was wearing my HF face shield...believe it or not, it didn't crack. You see, I don't always. It's too hot, it fogs up, yady-yady-yadda. Almost never for spindle work and very seldom for small stuff, such as this. Perhaps I have cause to reconsider my attitude.
Thank you, Harbor Freight.