I'm always coming home after my ride with my face covered in black gnats, some having flown into my eyes, etc. But several weeks ago as I was climbing a hill something nearly flew into my mouth. It hung onto my lip and stung the living daylights out of the inside of my lip; I think it was a yellow jacket. I have a pretty high pain tolerance, but the pain from the sting was almost more than I could take, having occurred in a very sensitive area. I nearly crashed the bike trying to get the bee off my lip then rode home about 20 miles with a swollen lip that lasted through the next day. So gnats aren't that big of a deal any more, just keep the bees away. Thank goodness I'm not allergic to them.