If it's not good or bad luck, what kind of luck is it?

As I was walking around the back yard, picking up dog poo, a bird flew right into my head. It didn't poop on me, it just about knocked me out, but no poop. Is this bad luck or good luck? Take into consideration the task at hand (picking up dog poo) and then decide... is a bird flying into my head really worse than what I was doing? I think it may have been good luck or perhaps no luck at all... just some random incident.