[ace]

I agree grant it. But I also agree with the other parties...

If I've properly introducted myself to both coaches it usually goes

"Hey John (or ref, or whatever it is they are appropriately calling us that game), give me a time out if he (mostly boys games) makes it."
"No Problem coach, just make sure you make the sign or say something incase i forget."
knowing that I won't forget I say that as a CYA kinna deal. If i blow the whistle and the coach is like no no no no no no ...

"whoops sorry guys, inadvertant whistle"