When I'm at work, I usually carry a camera when walking between buildings and to or from my car. I know that if I don't, I'll invariably run across an interesting bird - or maybe an ordinary bird doing something interesting.
Yesterday I was heading to my office from the staff parking area when I noticed a Northern Mockingbird on the ground. (We have a zillion Mockingbirds on campus.) It had just caught a bug and was whacking it on the ground to kill it. I was too slow to catch that action but I did get the rest of the sequence.