Which player has the lowest centre of gravity ?

As we all know Fergus Mcfadden is not only the best player in the six nations but also the tri nations and the super 15. His haircuts make him light on his feet and give that extra edge when evading that desperate tackle. He glides along like a hawk in the air. I hear he plays trombone also which can only add to his vast array of skills. He's also lined up to be in the new magnum ad. I heard he gives Chris Ashton driving lessons, poor Ashy isn't too good at the hill starts apparently. Philosophers and scientists alike can only dream of what Fergus did to acquire the lowest centre of gravity ever, investigations have been ongoing for the past decade.