An "almost" accident
Safety is important everywhere, especially at home/places we're familiar with because our guard can be down.
To illustrate, here's a story from a friend:
"While washing the dishes, I leaned over the sink to turn on the disposal. The dishes obscured my direct eye-line into the drain. I pressed the button, the sink began to vibrate, and a loud grinding sound began to whir. Within milliseconds, a cup shook free and fell over the drain just as a pairing knife was catapulted, blade up, into the air.
I was still leaning over the sink."
This could to anyone, and could have been a very bad accident had the cup not fallen over the drain just in time to catch the knife.
Double, triple check
Always check and clear debris from any machine/motors being turned on
If children are present, make sure an adult is supervising at all times