Golden Gate Park in San Francisco has lots of gophers. We can usually see their holes here and there, but it's rare that we actually see one hanging around outside of its hole. Tomokee didn't attack it -- he stared at it in a frozen state just like he does while staring at cats. We think he gets confused by life forms that he's unfamiliar with.
Here's a close up of the little guy. I think he (or she) is cute.