bat leaves batter's hands

[SanDiegoSteve]

How do we arrive at CI in B? The batter lost control of the bat, then it hit the catcher's mitt, causing a 2 base passed ball. And the catcher interfered how?

It seems to me, if anything, to punish the batter for interfering with the catcher's fielding of the ball, as in rule 6.06 (c).

If the catcher had stuck his glove in the way of a swinging bat that was in the control of the batter, then we would have CI. I say as soon as the batter threw the bat at the ball, the onus was on him to avoid any interference.

I don't have a copy of the BRD, or a J/R manual to find any other interpretation, however, so I could be way off here.