I did the same thing a couple of weeks ago, I didn't choke on any though but one got stuck inside my helmet. I had to stop, take my helmet off so it could get out. That bee was angry, ANGRY I say. I kept trying to get it away from me. A few people rode by me asking if I was okay. I must have looked like a drowning man asking for help. I just yelled out "BEES!" I finally had to ride off with my helmet hanging from my bars to get away.