This is one unique movie. The use of split screens throughout makes for non stop action that keeps the viewer's eyes glued to the screen. An interesting premise that's fully realized. It's truly unbelievable that the entire dialogue was improvised...it sounds as if it was shot from a script. The actors are uniformly excellent. Hats off to John Ritter for a sensitive, groundbreaking performance. And Lin Shaye is laugh-out-loud funny, too.