I'm pretty bad at being around blades. I have a bit of a phobia I guess. Though I do use things like xacto knifes without too much trouble. Though saying that I have to be super careful due to my right arm and hand being a bit useless and dropping things.One might run into unexpected blades in my home.
On one occasion my hand just did it's usual thing of dropping an xacto knife, in my haste to catch it I whipped my hand down, only for the knife to land perfectly, butt end down on my knee, with the sharp pointy bit sticking up. And I slammed the palm of my hand right on to it. It was pretty nasty.
I never try to do that any more!