Eye Roll Championships

Ever been a third-party in a two man discussion where each one of the persons involved is deep into some rant and you sit back and watch each person take turns eye-rolling at the others tale?  You know neither is actually listening to what the other has to say.  They spend the entire conversation contemplating sharp-witted comebacks or plotting how to use the information against each other at a later date.  A diabolical yet fascinating phenomenon.