Last Sunday I had a regular old wasp fly into my helmet and sting me 2 or 3 times right in the vein that runs through your temple ... Within a few minutes I was dizzy, sweating balls and on the ground puking for a good 20 minutes, I woke up the next morning and my face was sooo swollen from my temple down to my jaw line. I looked like one of the hills have eyes people ! Needless to say I'm buying a fullface helmet.