Stage-trained Laura San Giacomo made an auspicious debut as the brassy, hedonistic Cynthia in Steven Soderbergh's low-budget 1989 hit, "sex, lies and videotape". Her career has flourished since, but with the exception of her supporting role as Julia Roberts' wisecracking hooker friend in "Pretty Woman" (1990), her films have not showcased the brown-eyed siren's sass so evident in her first performance. San Giacomo starred with Tom Selleck in the Australian Western "Quigley Down Under" (1990), registered weakly as a femme fatale opposite Liam Neeson in "Under Suspicion" (1992) and played a