Despite its provocative elements, there's less to Alejandro Gonzalez Inarritu and Guillermo Arriaga's variations on the theme of miscommunication and careless acts than meets the eye. It begins in rural Morocco, where weathered goatherd Mohammed (Mustapha Amhita) buys a neighbor's rifle so his adolescent sons, Yussef and Ahmed (Boubker Ait El Caid, more