Ключевые слова: active, activities, activity, city, crash, derby, disco, equipment, fail, fall, foot, fun, hobby, leg, leisure, leisure activity, lifestyle, male, man, men, motion, outdoors, pair, people, quad, recreation, recreational, roller, roller skates, shoes, skate, skater, skating, speed, sport, street, summertime, training, transport, transportation, urban, wheels,