A man wearing an unfastened helmet holds himself up on the side of a wall as people look on .
It is almost certain that a man in a helmet is propping himself against a wall around other people .
It is almost certain that a man in a helmet is propping himself against a wall around other people .
It is impossible that a man in a helmet is propping himself against a wall around other people .
A man in a helmet is propping himself against a wall around other people .