Some people have the ability to use both hands with equal skill, and are referred to as ambidextrous. This occurs naturally in about 1 in every 100 people. Others teach themselves out of curiosity or necessity, following an injury or illness.
This clumsy challenge involves drawing with your non-dominant hand, and while it may leave you feeling somewhat ham-fisted and uncoordinated, it will also leave you thoroughly impressed by those who can do it all with both hands.