Obstruction/Interference/Nothing???Discuss

[umpjong]

This play did not occur (so I cant tell you how it was ruled on the field), but was watching a game and it was one of those almost happened plays.

Bases loaded, 2 outs. Batter hits a swinging "bunt" that rolls down first base line. As the runner and catcher make their way down the line approaching the ball the pitcher also converges. As the catcher picks up the ball, the pitcher runs into the batter/runner causing him (b/r) to fall in to the catcher, who then goes to the ground with the b/r (no tag has taken place-or add a tag if you like since it is a discussion) and loses control of the ball. The ball then rolls into a dead ball area. Were do you start and what is your ruling..

I have discussed this particular play scenario with the infamous (Ump)JJ and will post what we agreed on later.