I had a near miss with a squirrel the other day, I slowed down in advance, so he made it across the road well before I rode past. So he actually did a u-turn, and ran back in my path, turned around, and started doing some kind of fancy puffy tail display. Captured it on video. Apparently they are trying to protect their turf when they run in the road like that, so knowing that little fact gives me more ability to avoid them.