If I'm bringing the captains out, I ask the speaking captain "what are you doing if you win?" So far, everyone's told me 'defer' or 'receive', but I'm waiting for someone to say what Lone Star had...
When we used to bring the captains out for the second half for their choices, when my captain had the choice, I'd jokingly ask "you want to kick, right?" For years, every captain would either laugh and say "yeah, right", or tell me "no, we're receiving." However, one night, the captain looked at me in all seriousness and said "yes, sir." I made sure to tell the referee as we reached the hash marks that "Captain Jones has indicated to me that he wants to receive" so that we didn't let him screw that up.
I supoose I don't really need to tell you that was the LAST time I made that joke.