Rapper Eminem gave fans a surprise at the House of Blues in Los Angeles on Saturday when a mummy character dancing onstage revealed himself to be actor Dustin Hoffman. The "My Name Is" MC, who performed two shows at the venue that night, was also joined by mentor/rap producer Dr. Dre. After Eminem's performance with the mummy, the audience demanded to know who was behind the bandages. The rapper pulled off the head of the costume to reveal sweat-drenched Academy Award-winner Hoffman. With a different mummy in tow Sunday night at San Francisco's Fillmore auditorium, the outspoken rhymer leapt off the stage mid-show to tussle with an audience member who he claimed was baiting him, leading to a scuffle that ended the show early. "Security, get this motherf---er outta here before I do," Eminem said. Among the guests attending that show were funk legend George Clinton.