What is in this image? Describe it as if you were explaining it to someone from the 15th century.

This image depicts a man performing a daring feat of balance and agility in a wintry landscape. He is poised in mid-air, having leapt from a gently sloping mound of packed earth or snow, much like a hill. Affixed to his feet is a slender, flat board—reminiscent perhaps of a sled, yet narrower and smoother. This board allows the man to glide over the snow with remarkable grace. The man wears clothing suited for cold weather and a close-fitting cap, all designed to keep him warm against the chill. His expression is one of focused exhilaration, suggesting that this activity, though risky, is performed for joy and perhaps competitive sport.Nearby, another man stands watching, also dressed for the cold and holding another board similar to the first man''s. Various symbols and numerals adorn their garments, hinting at some form of organized contest or team affiliation. Mountains rise in the background, and the sky is clear with the presence of sunshine, indicating a bright and crisp winter day.Overall, the scene captures a moment of adventure and mastery over natural elements, a celebration of human dexterity and the pursuit of pleasure through innovative means.