I saw this show quite some time ago. The crazy thing about the bees killing the wasps in that manner is that they actually only produce one or two degrees more than wasps can handle, if I remember right. Also I think they said that they aren't sure how the bees coordinate the attack but one minute the bees are going about their business and then all of a sudden they just swarm a wasp all in the same instant. Pretty cool to think that they evolved such a precise and specifically targeted defense mechanism.
