I found this:
https://en.m.wikipedia.org/wiki/Bald-faced_hornet
Apparently they can spit venom in your eyes and cause temporary blindness!
They are the nastiest bug we got in these parts, and they get huge. I watched one hunting at my cabin once. It would fly in, go right to the window where there were flies and wasps trying to get out. He would kill the fly or wasp then fly out the door with it, then 15 minutes later it would be back to grab another one. It was amazing how he knew the difference between the door and the window.