What is the most annoying thing that happens to you on the bike?

[Mixagon_imp]

RE stinging insects inside helmet:

Yeah max - an always present risk. Hasn't happened yet to me, but always wary.

Getting a sting in the eyeball is almost like puncturing an eye tumor yourself with a safety pin. Not very pleasant.

Back in the 70's riding behind a mate when all of a sudden he started swerving and then his back wheel locked up and he came to a quick stop and just dropped his bike and went running up and down the grass verge tearing his upper clothes off. It was so funny I couldn't stop laughing
A wasp had gone up his sleeve and stung him many times.