unfortunately lots of folks just do not stop and think they are so envolved with just the engine reaching over a spinning prop ,loose clothing, when I had one of my diesels running I dropped the allen adjustment wrench into the prop yes an accident when I have an engine on the bench I have on a full clear lexan face protector
It shattered the prop and the stuff bounced off my mask this issue will get worse with the electric motors instant
on with the flip of a switch look at the ER visits with not following safety precautions with chain saws and power tools besides our model engines I got a severe cut just flipping a prop plastic (did not sand off the sharp edges)
and that was just checking the compression not even on the bench martin