I was swapping out all the tops with my new tops I made with the feeder holes and top exit slots. Cloudy all day and didn't take smoker about 45 minutes before dark. Now that I think about it, thats kinda all the wrong conditions hugh. Anyway, was done and taking off my suit about 20 feet away from hives. I waited a few minutes before removing suit. Didn't hear or see any bees. Then pow, 2 hits right in the left temple. Thats not a good place to get hit. Duh.