Here is a little story for ya...

I had just received a package with a couple of nifty knives. So naturally I was checking them out. My son comes over and asks what I had. I start showing them to him and explaining the cool features. One of the knives just slipped out of my hand and embedded in my foot. That hurt. I was lucky there was no tendon or muscle damage.

My son and I now laugh about what a great example I was then.