I love that this article calls them "raging spring hormones."
Then, today at lunch, I run a few errands, come back to the parking lot, and someone that works next door that I speak to every now and then walks up with it in his hand! It was biting him and screaming for dear life. He's like, "Look, this was in my truck!" I laughed. He said that it comes back each and every year and has the same nasty ritual with his truck mirrors as well as another truck's window in the parking lot.
Interesting bird. I've only ever been attacked by a blue jay, but I'll be sure to steer clear of these beautiful birds, as well.