What to do?

[umpire99]

I saw this while waiting for my game to begin. R3 one out. Flyball to F8 who catches and throws to try to get the tagging(?) runner. After the play, defensive coach instructs F1 to throw to F5. F5 steps on the base. This is where it gets interesting. BU points to PU while PU points to BU. PU then realizes that this was his call and signals "safe". Defensive coach questions the play, but of course it stands. What would you have done as BU in this situation where you know that your partner was not watching what he was supposed to be watching?