At the end of "Frasier," there is often a silent scene which ends the comedy. Last night the segment centered around cups of coffee. One character suspects the other has added something to the cup so they begin a classic exchanging of cups of coffee to avoid getting the "extra." The audience figures out, before one of the characters, that both cups may be "tainted." It's a way that something very ordinary - a cup of coffee could not be more so - is used to sum up the relationship between the two characters without one word being spoken.