The rig had been circulating off bottom and was about to trip back to bottom. While the driller was setting back the Kelly and the crew was preparing for tripping operations, the derrickman went to the derrick board and connected his Safety Retracting Lifeline, but failed to connect his tail lanyard. When the derrickman attempted to latch the elevators he realized that he had not attached his lanyard. He grasped the elevator horns and was lifted off the board. As the elevators cleared the stand, he warped his legs around the stand and rode it across the derrick. He was able to grasp the bridle line and get himself on a derrick beam and then back onto the derrick ladder.