Yeah, they are not too smart when it comes to dealing with vehicles. I had a button buck actually run into the side of my truck while I was stopped. I too saw him trotting across a field headed towards the road. I kept slowing down and he kept coming. Finally I was stopped in the middle of the road. He then skidded across the road and ran head first into my drivers door. You can still see the dent if you look along the door. He got back to his feet and took off none the worse for his experiance.