From the cancer-stricken title character of Brian's Song to the broken-footed novelist of Misery (don't even get us started on The Godfather), James Caan knows a thing or two about suffering onscreen. So naturally we're stunned to learn that the "creative differences" that irreparably fractured the actor's relationship with David O. Russell on the set of Nailed came down to... the proper way to choke on a cookie? "Russell asked him to cough as he choked, but Caan argued that the character couldn't cough and choke to death at the same time," wrote Gregg Goldstein today in The Hollywood Reporter. "Russell suggested that they shoot it both ways, but the actor expressed distrust that his version would be considered and left the South Carolina set." Caan's replacement has yet to be determined, but will be screened carefully by the newly wary Russell for his knowledge of (and loose adherance to) basic physiological functions. [THR]