Just make sure they have to do with bugs in the ears or on the face or grime, or a billion other things we have eaten, had explode all over our faces, got stung by, or otherwise got hurt by.
As for me, i cannot think of things, I have not been hit by or worn painfully.
The worst was and I think always will be a small rock, which was being carried by a Transport and got me it the head just below the helmet. It hit so hard when i pulled over i was ready to fall, and a dribble of blood was pouring down my face.
I still duck when going by them.
In position Number 2 was the bee which got me with its stinger in that vein which leads to the brain, what a buzz, so F&^ked up, I went to the emergency room, and fell down, got me and my bike there though, luckily it was only a few blocks away.
I got 1000 more, like why I pause at green lights and will roll through Red ones, all in the name of my safety. If ya need to ask your a new rider, and I will be happy to explain.
Cheers and Smiles for Miles and Miles...
Kitbag