In Salt Lake City, Utah, ANTIQUES ROADSHOW host Mark Walberg takes the plunge down Olympic Park's bobsled run to get in the zone for a look at Olympics collectibles with appraiser Philip Weiss. At the Salt Palace Convention Center, ROADSHOW experts favorably judge such outstanding finds as a 1920s to 1930s-era folk art quilt depicting scenes from Mormon history; a valuable Utah landscape painting by 20th-century Swedish-American artist Birger Sandzen; and a mid-19th-century archive of materials documenting the career of Philip Margetts, considered the first prominent Mormon actor, brought in by his great-granddaughter and valued at $100,000 to $150,000.