You don't come in to change the call. You come in to give your partner your info as to what you saw. Then it's up to the original caller to decide what to do. If he is sure he had the call right, he'll say "thanks but no thanks". If he has doubt, he'll go with you. I remember that play and that's just about what happened imo.
OOB calls aren't judgment calls like fouls. We gotta try to get every single one of those calls right. And in a tournament like this, missing a key OOB call as an official could mean watching the next round of games on tv.
That is one call that absolutely has to be pre-gamed as to helping each other out.
Btw, as for the coach going ballistic, he had to. I think that it's some kinda prerequisite in the coach's manual.