1978 🚘 Objects in the sideview mirror
One day I was riding along in the bike lane, in high gear, and pedaling like an enthusiastic kid on his way somewhere; when BANG! I saw stars and was rolling in the dirt and gravel along the side of the road. After I tumbled and skidded to a halt I saw the truck that had hit me. It was a large pickup, with those extended mirrors for when you're pulling a trailer -- only he didn't have a trailer, and the damn mirror had hit me in the back of the head and took me out. A baseball bat to the back of the head, wouldn't have been much more effective.
I had road rash, a major lump on the back of my head, and was picking out gravel and a headache that lasted for days. The guy never slowed down; and I assumed he'd seen me, or if nothing else, heard the mighty bang of his mirror hitting me in the back of the head, or the mechanical clatter as my bike and I rolled end-over-end. I'm still not sure if he did it on purpose (for sport). I'd bounced up pretty quick, so I obviously wasn't going to die or anything. Still I was grumbling what I thought of that guy and his lineage the whole two-mile trek home.
The moral to that story was that just because you're following the laws, doesn't mean you can't get hurt.