OK, I don't really know if the story is true, but here it is.
A friend of mine is a contractor, and has been on a gazillion job sites. He was on a site one time where more than one crew was working. There were some carpenters [I dunno, framers or what] who left their saw horses and a circular saw on the jobsite.
Homeowner decides to do a little DIY work using the horses and the saw, to cut some plywood. Has his kid sit under the plywood.
Saw goes into the kid's head.
Makes you wonder.
Happy and safe New Year to all.