I haven't had to much happen to me (yet); the worse was when someone tried to throw their taco bell trash at me, missed so bad that instead of getting angry I just laughed. Although one of my dads friends went on a warm up ride before all four of them were meeting up for a breakfast ride and he came back with a huge red stain on his back; apparently someone threw a whole burrito at him. Another one of the guys got in a yelling match with a police officer about the rules of riding two abreast on a country road, Mister officer ran with his tail between his legs after that one.

Another thing that hasn't been brought up here is cars/bikes sneaking up on you. I know motorcycles can't help it but I've had a huge red diesel pickup with twin top mufflers throw in his clutch until he was right next to me and just slammed on the gas. Needless to say it scared the crap out of me and I almost went of the road with that one.