OLHZN-21 was the twenty-first high altitude weather balloon flight for Overlook Horizon High Altitude Balloons. This flight launched on September 23, 2019 at 2:51:40pm PDT (21:51:40 UTC) from Las Vegas, NV. This flight was a top-secret collaboration project with the NHL’s Vegas Golden Knights to honor the “opening knight” of their third hockey season on October 2, 2019 against the San Jose Sharks and set a new VGK Worldwide Record for the Highest Altitude Puck Drop.