Sylvester Stallone's son, Sage, died of a heart attack, an official with the Los Angeles County Coroner has said. Stallone had a small amount of the sedative hydrocodone in his body but it was an acceptable level and one that could be found from taking over-the-counter pain medication. No other drugs surfaced in the toxicology report. Stallone, who died at age 36 on July 13, was found in his Hollywood Hills home after family and friends became concerned when they hadn't heard from him for a day. Hollywood icon Clint Eastwood made a cameo appearance at the Republican National Convention and a seemingly off-the-cuff speech, at times addressing an imaginary U.S. President Barack Obama in an empty chair. The "Dirty Harry" star endorsed Romney earlier this month. His speech berating the "invisible Obama" has attracted criticism from several celebrities on Twitter. Spike Lee's two-hour documentary called "Bad 25," had its world premiere at the Venice film festival on Friday (August 31). The film, about the making of Michael Jackson's 1987 album "Bad," features interviews and films of concerts, rehearsals and music videos. Released to coincide with the 25th anniversary of Jackson's follow-up to "Thriller," Lee paints a picture of a genius at work who cared about every step of the production process. According to various media reports, Simon Cowell saved nine people on a sinking ship. "The X-Factor" judge was on his yacht vacationing in St. Tropez when someone heard a distress call from the nearby 35-foot sinking boat. Cowell ordered his captain to rescue the nine people to safety.