What would you have said?

[crazy voyager]

I've never been in this situation (maybe becuse I am quite fresh as a ref) but I would have lfet it during game, esspecialy if he was R and I U, but I would ask him as quick as I could, perhaps during a pass-by at a throw-in or free throws, just change a few words but still make a mark that "I saw the call, I can take it, you don't need to bother" or something like that. Still it's a tricky situation and I think you did the right thing, especcialy scince he was a friedn, but it's damned hard making those calls right-and worse changing them