I got stung several times, but I always carry bee spray in my truck and the next day I came back and sprayed all the ground nests, then I mowed again today and no more bees, they are dead and all gone. I recommend everyone here carry bee spray, we will run into them here in the landscaping business sooner or later.
Several years ago I mulched a door mat with a weed eater mower, and surprisingly the mower wasn't harmed at all. Still have it, trashed the motor, still have the deck. Its sitting in my "Mower Junkyard", full of ZT's, ride on's, push mowers, snowblowers, and anything else power equipment and a shed full of engines and a shed full of parts.
And mower deck piles that will be scrapped soon