Legendary ski coach who taught racing techniques on a tiny hill in Minnesota. I last saw a video of him carving turns at age 93 or 94.
Link: https://www.kare11.com/article/news/local/erich-sailer-ski-coaching-legend-dies-at-99-after-lifelong-dedication-to-athletes/89-a155722f-6a89-43e5-aefa-9f1171765a31