Monday night a 29-year-old Rancho Penasquitos man was out walking his dog when he was struck and killed by a speeding motorcyclist. The 26-year-old motorcyclist was also killed in the collision. The motorcyclist was riding a 2011 Ducati and heading west on Carmel Mountain Road at about 9:30 pm. The pedestrian was crossing Sundance Avenue in a marked crosswalk when the motorcyclist struck him. Both men were thrown some 300 feet from the point of collision. The bike slid an additional 200 feet farther. Investigators determined that the motorcyclist was traveling at about 80 miles per hour.