I got attacked by a Blue Jay once, I don't blame her, but it totally startled me. I was walking in the park behind my Mum's house and looked down and saw a little baby bird staring back up at me, I stopped, kinda looked down and asked him what he was doing sitting on the ground (I didn't really expect an answer), just then I heard a loud squawk from overheard and then mother bird smacked me in the head! I just ran away as this birds chasing me. It must have been a funny sight for anybody watching.