Don't know much about hornets but I've heard you want to let a nest get frozen solid hard before you bring it inside and get it warmed up.
Hornets can track a rock back to the thrower from 30 ft away. If you mow into a nest that's hidden under the ground branches of a spruce tree you should leave the motor running to distract a few from chasing you. Those two I'm sure of.
Thank you,
MrSmith
Story time:
I went to move a brush hog (kinda like a mower) and the hornets came out from under where the brush hog was parked, I bailed and ran, the tractor sitting there at idle and the PTO just turning away. I think I got stung once. The tractor ran all day sitting there nothing you could do till it ran out of gas.
How to get rid of these little a-holes, watch some youtube and learned about home made napalm, this sounds fun, mix up about a gal of the stuff, wait till night and pour it down their hole, then light.
How can these things fly while they are on fire. I then spent the better part of an hour stomping out little flying things on fire landing in the back yard.
I still can't get my head around how they flew, the wings look so fine. But they did fly, and I was really worried about setting the entire pasture on fire.
Next I get in my Bronco II, (should date the story a bit) and I park it over the hole. The things start bouncing off the windows, HARD. It was summer so I have the AC on in the truck and a couple of magazines. Then I start to hear them getting chopped up in the blower motor....ahh this might not be a good idea, drove away.
Finally some of that spray foam into the hole and then found a second hole and foamed that.
That is how my little war went.