I tell the coach "I'll be looking for you." That way you acknowledge coach's intentions and make them aware that they do need to call it.

Ok, that got me thinking, both have indicated they will want TO, FT made, both call time at exactly the same instant as promised.......now what? Charge the guy that warned you first? Does the rule book address simultaneous TO's? I don't recall anything on that one. I guess you could tell the second coach that the other guy already plans but he does not I will watch for you?