That exact thing happened to me on my Sunday ride! In fact, I got stung twice on that ride - a wasp hit my face and stung me just above my upper lip Fortunately I didn't react too badly to that and I think the way it hit me I wound up not getting too much of the venom, but it still hurt and was a big shock.

Then, just as I'm getting close to home at the end of the ride a bee gets stuck in my jersey and sure enough, I get stung again! That one was worse. Man, that's three stings while riding this summer. I'm not sure what to make of that!