A person wearing a black sweatshirt and red pants is riding on a snowboard on a green box .
It is impossible that a man riding a snowboard on a green box at a skateboard competition .
It is impossible that a man riding a snowboard on a green box at a skateboard competition .
It is almost certain that a man riding a snowboard on a green box at a skateboard competition .
A man riding a snowboard on a green box at a skateboard competition .