The summer before my senior year, I was helping a friend put up a dipole antenna on the wooded easement below his house one evening about dusk. While holding a length of coax, I looked up to see my small dog leaping around in a curious fashion. I thought to myself, "The last time I saw her do that, she was being stung by bees."
Then my leg was on fire. I looked down at my leg, fully expecting to see it on fire, and was baffled by the lack of flames. It was on fire, I could feel it burning like hell, but no flames? Then I finally put it together. I was standing over a ground hornet's nest, and they had gone up my pant leg.
More to the story about a suddenly amazing athletic ability, disappointed paramedics, a cop that knew where I lived, and being naked on the back patio in full view of the neighborhood.
Suffice it to say, 30-plus hornet stings [bleeping] hurt. A lot.
ETA: In keeping with the theme of the OP, here's the little fellow I caught in my garage last year.