Unlike film and television, theater is unfinished until the audience completes the equation. When you enter the theater nothing is guaranteed; you do not really know what is going to happen. How you watch and what you are doing while you watch will have an impact on what is happening on the stage. The potential for a powerful communal experience in the act of coming together is a constant incentive to going to the theater. The audience teams up with one another to have an impact upon the stage and also learns from one another how to watch the play. Within a very short time, minutes into the rite of any performance, actors generally sense what kind of audience they are dealing with and adjust accordingly. But in opening ourselves to other people, we take the risk that the experience may not be reciprocal. An unsuccessful gathering can render confusion and disorientation. Theater is incomplete. The audience completes the experience of constructing the fiction. But there is always...