I got stung on the back of the neck by a bee, while riding, and I thought I had it bad.
Sheesh - this is why I am afraid of these creatures. My bf had one fly into, and get lodged under his helmet when he was riding once. (he shaves his head, so no hair to protect) I wasn't there, but he said he freaked out and was flailing his arms like crazy trying to get to it, had to vear off the road, drop the bike, etc....He said people along the road were just stopping and staring. Sounds kinda funny, but I am sure it wasn't to him at the time.