This thread reminds me of a commute I used to run a few years ago where I there was a certain hill I could scream down each morning. Once I saw two sparrows flying together low to the ground off to my right. It looked like one was chasing the other and they must not have noticed me until the last instant. One flew about 3 feet to the left of me, the other flew between my left leg and seat tube! Talk about fast reflexes!