Don't mow rock, wear protective eyewear and a mask if you don't want to inhale dust/pollen/etc and you will be protected from 99.9% of all conceivable injuries

Don't mow rock, wear protective eyewear and a mask if you don't want to inhale dust/pollen/etc and you will be protected from 99.9% of all conceivable injuries from a modern gas mower that has a safety switch.