I know it sounds like a crazy question, but we have 6 hives. one of the 6 had just gone into swarm mode in the past week or so. We took the queen cell and rack of eggs to add to a weak split two days ago. This is the hive I mentioned gave me fits a couple of days ago. Just in my face, popping the veil, covering my hands, but no stings. Today Steve went by with the mower (he mows every week with no problem) They attacked him - 7 stings. He returned to mow a different area, about 50 feet away from the hive and got nailed again. He decided to mow the other side of the house, Then he weed whacked and got nailed again, still quite far from this hive. Ten stings... and the first 8 came with no warning. Any other time any have ever protested the mowing (different hives) it has only been a warning sting or fly by, not a total attack. Advice? Requeen or just call it a bad day for the bees.