Okay so all that stuff about doing dumb things with knives your mother told you? You should listen. As the splint on my thumb to keep the gash in that thumb from reopening if my thumb bends will testify. Older but no wiser that's me.
Luckily it is my non space bar thumb so I can still write.
Less luckily it is splinted for a week. And can't get wet. Interesting.
To cut a long story short, there was blood, there was much closeness to fainting (and I'm not the fainting at the sight of blood type).
There was a tetanus shot so I now have a sore arm to go with my sore thumb.