Yesterday I was discharging with the 52". On the second perimeter cut I was stung twice in the same spot in my leg. I had to finish cutting which was about 10 more minutes. There were about 40 bees swarming from the nest. Today I was 21" at the top of maybe a 7' hill and I instantly noticed 2 pains, one in each leg, I dropped the 21" it rolled down the hill and I took off running. I tossed my headphones and didnt turn til I was maybe 6 houses away. My bro took over and 4 min later he was stung twice in the same leg. He walked over to the truck where he was stung again. I took the 21" to put it in the trailer, and I was stung on my hip. Thats when it occurred, they were in the bag. We raced home (lawn half cut) and saw a few swarming the mower. I am not allergic, but my brother is. His legs are cramping but I dont think he needs a shot.