[AtlUmpSteve]

I go back to what Mike said. Where did the ball hit the batter-runner?

Apply "in" or "out" of the box the same as you apply in or out of the running lane. If the ball hits the part of the BR in the running lane, nothing; if it hits the part out of the running lane, interference. The same application applies to touching a ball in fair or foul territory; it is the position of the ball that counts, not the position of the toucher.

So, if it hits the BR in the box, foul ball, out of the box, interference.