The puck is shot out of the defending zone but immediately shot back into the defending zone causing a delayed offside. The linesman signals a delayed offside by raising his arm and calling out offside. The attacking players start proceeding out to the blue line to tag up. A defending player gains control of the puck and in attempting to shoot it out of the zone the puck deflects off one of his players and goes into the net. The linesman is just dropping his arm as the puck crosses the goal line.