More on Batter Interference

[teccan9nja]

These couple posts about BI makes me wonder what it would take to get a BI call. Specifically on pick-offs to third base. Many batters will notice the catcher pop up and take a step or two back in an attempt to get out of the way to avoid the call. Sometimes those actually get into the way of the catcher. I've never called it because I want to understand the call better before making it.