Ключевые слова: active, activity, balance, balancing, bicycle, bike, biker, biking, caucasian man, challenge, copy space, cycle, cycling, cyclist, environment, extreme, extreme sports, forest, freestyle, handsome, helmet, leisure, male, mountain bike, mtb, outdoors, people, person, pines, place, rocks, rocky, side view, skill, sport, sportsman, stunt, transport, transportation, trees, trial, trial biking, wood, young adult, youth,