I know I've posted this before, but here goes...
A few years ago I was on my way home from work. As I crossed the last major intersection- about a mile from home, I heard a rustling, scratching noise to my right. I looked down (thinking I would see a leaf skittering along the pavement) to see a squirrel running alongside me- chasing me like dogs do. I was doing 16-17 mph at the time, and the little devil kept up with me for about 100 yards or so. I'm not sure what his deal was, or if he meant me any harm, but I certainly wasn't going to stop to find out.