Ninja Squirrels

Today, as I was walking to class, I saw two squirrels chasing each other down the sidewalk. At first I was scared, but then I realized what they were doing. One would lead, run a short distance, and then hide behind a wall or tree. The other would then follow very stealthily. I remember when Andrew and I used to play that, pretending we were spies. So I respected their covertness and pretended I hadn't noticed them. MLIA.