At the risk of sounding like a crusty old codger, it's a bad development that lots of people nowadays talk at full volume and can't get off their phones in the theater. However laughing, crying, and shrieking–these are actually good.
There are probably a lot of avid filmers on this site, but if you haven't seen it, rent Before Sunrise. It's beautiful and perfect on it's own but never has a sequel (Before Sunset) landed such an ending emotional punch.
