Two good Samaritans may have saved a visiting couple that nearly plunged to their deaths in Stinson Beach last week. The couple, in their 20s, were taking pictures along a cliff with their backs to the sunset when they slipped and fell 150 feet, said Stinson Beach Fire Department Chief Kenny Stevens. “The gentleman climbed up to a rock outcropping, the girl sat on his lap, and for unknown reasons they fell back over the…