A local wood working supply store had a demo of this a couple of weeks
ago. I wan't interested enough to drive across town to wee it.

But the lady who invited me said the were going to "break some blades".

Stopping a blade revolving at 3600 RPM - in less that 1 tooth probably
does break some blades.

And throw saw teeth all over the place...

I'm all for safety. But this is a bit over the top.