Jenny and Johnny were always a competitive pair of siblings from the day they were born. Fraternal twins at birth, their ages were obviously identical, but Jenny came out first just by a few minutes. She would always tease her baby brother about how she was the "older sister". It was of course thought to be friendly sisterly ribbing by most, but Jenny knew that it bothered her brother, so she would bring it up whenever the opportunity presented itself. She had slightly better endurance than Johnny and could run slightly farther than he could. She had slightly better speed and could run slightly faster. She could jump slightly higher than he could. She had slightly better vision. On and on it went. What Johnny had though, that his sister didn't have, was a higher level of stubbornness. MUCH MUCH higher. It was this stubbornness that led to a disturbing contest of "Let's see who can hold their breath the longest contest"...