When Birds Attack

Okay so it was only one bird, but odd enough that it felt worthy of a post. So I'm walking back to my apartment after lunch with Mikell and as I'm walking through Powder House Square about 2 blocks from my apartment a bird flies directly into my left arm and then vears away. As I'm glancing back at the bird it takes another dive towards me, so I move more quickly away and fall outside its little bombing loop. This continues for another couple of iterations: bird charges and I move away faster until I'm in the crosswalk walking across the street at which point I can't see the bird any longer. So I'm kinda bemused by what I could have done to incure its aggression. anyhow, I thought it was a rather odd little story.