Drove motorcycles for 20 years.
One of the worst indcidents was driving down a neighborhood street in the late evening, at the speed limit as it was something that I learned early on, and staying a bit to the right as one learns to stay out the center of the road. All of a sudden something real big a few inches from my head flew by. I turned around to check it out, and found a parked, large, dark flat bed truck with a high bed sticking a ways out into the street, and dirt all over the tail lights so you couldn't see them.
Another time I was merging from I5 onto a state road, turned to check traffic, and when I turned back around I saw a large metal frame warning sign sitting in the road where the lanes merge. I swung hard to the left as I had just checked it and it was safe, there was a lot of traffic, and just clipped the sign. I wrestled with the bike, moved into the #1 lane, pulled over on the meridian, and put the bike on the centerstand. The bike, a 750cc Yamaha, had a flat front tire, the lower fork leg cracked in half and was dripping oil, the right side of the engine shaved off and was dripping oil, and the brake pedal was bent back 180 deg. I looked at my boot and was glad that they had steel toes, but my toe was starting to hurt. Then a CA patrolman pulled up and said that he had just told the construction crew to move the sign as someone would hit it. He must have been real smart as how did he know that I'd hit it :^) Then the construction crew pulled up, and then a friend with a pickup. I got the name of the construction company, they ended up covering all costs, and while getting the bike into my friend's truck I noticed that my wrist wasn't working right. I had ended up with a sprained wrist and broken big toe, and a feeling of being grateful for how some things turn out; it wasn't good to have hit the sign, but things could have been much worse.