I can not speak from being stung while riding a bike but I know those darned yellow jackets are bad. Moved into a house and went to push mow the yard. Ran over a nest in the ground and at first thought mower had thrown rocks or a stick on me. WRONG!!! Was wearing shorts and got stung 7 times once pretty close to a very private spot. Talking about pain. Throbbing pain all night long. Nothing I tried helped. Maybe a little but not much. Brother did get a wasp sting on his mouth while riding an atv. Mouth swelled up looked kinda funny.