Professor Lucas Lepri demonstrates the Ippon Seoi Nage, a one-arm shoulder throw from a standing position. The technique begins by making a collar grip while the opponent holds the arm. The throw involves stepping, turning the body to face the same direction as the opponent, and lowering the base. The opponent's armpit should be on the thrower's biceps, not over the shoulder. Pulling the collar and turning the hips lifts the opponent, leading to a controlled breakfall. Practice involves starting in place and then moving with the opponent. Emphasize protecting the arm during the breakfall.