As you see, even in another swarm, they aren't hurting the hand in the midst of their family - they have one goal and their bellies are full. Please remember a swarm of honey bees (all female, but a few drones for breeding) is never something to fear, instead they are just looking to expand their family. You have to hurt an individual bee for it to sting you - that bee will die after it does and they work to avoid it. These are FAR different than hornets or wasps...
It is important to note that the hybridized African Killer Bees are not what we're talking about here. Those bees, crossed in a laboratory, has instead created a very dangerous bee that is FAR more aggressive and will sting again and again.
Thanks to Tech for another interesting video!
...and he turned aside to see the carcase of the lion: and, behold, there was a swarm of bees and honey in the carcase of the lion.
And he took thereof in his hands, and went on eating, and came to his father and mother, and he gave them, and they did eat: but he told not them that he had taken the honey out of the carcase of the lion. Judges 14:8-9