"Where there is no struggle, there is no strength." (Oprah Winfrey) We love watching the acrobatic maneuvers of our squirrels at the bird feeders. They must be quite strong!
There was a video making the rounds recently where a guy built an obstacle course for the squirrels like the show total wipeout or Ninja warriors. Your shot reminded me of that. Their determination and cleverness! If you haven't seen it yet me know and I'll dig around for the link...