Hornets. A couple of weeks ago one wedged itself between my closed lips and before I could spit it out it stung me on the lower lip. It hit me right between the lips, hard enough to embed itself between them. Last week one got in behind my glasses... didn't get stung though. The shock is actually worse than the sting I think, the latter is just painful for 20-30min and then goes away. But I wouldn't want to get stung in or around an eye.