Mark inspired the author to take up horse riding after the author watched a horse show with Mark at age 11 and enjoyed it. Mark then invited the author to take horse riding lessons with him, which the author agreed to because it is exciting and good for health. Mark has more experience with horse riding, going to the hippodrome 5 times a week for 8 years, and has won some competitions, while the author has been riding for 5 years and going 3 times a week, taking part in 3 competitions so far without winning but hoping to in the future.