I know for a fact that you can actually hit a squirrel while bike riding. Several years ago some of us were coming down Petty Gap Road near Woodbury when a squirrel ran across the road with an acorn in its mouth. One of our group did run over the squirrel, he dropped his nut , dusted himself off and ran across the road. He appeared to be pretty upset about losing the nut but it did happen. Just ask AB if you don't believe me!