Had A similar incident but wasn't as lucky... Riding in WV it was a warm day so had jacket slightly unzipped felt a hit on my neck figured it was a beatle or something, no sting 'til about 30 min. later while in a covered bridge i felt sting on my chest, in my bra!!!!! Honked my horn at my friend, made a quick right into a parking lot and started stripping as soon as I stopped. My friend is like what the Hey are you doing, then he realized I'm allergic to stings and saw the Yellow Jacket fall out of my bra. Only got one sting, and emergency tobacco poltice stopped a severe reaction. Thank goodness for Harley rider in parking lot that day, he was the only smoker out of 5 people there.. I was able to ride back to our camp take Benadryl and sleep off the mild reaction I ended up with.