Hak Seon Yang is a 2012 Olympian representing Korea. He is also the reigning World Champion on vault.
At the Worlds in Tokyo, Hak Seon Yang won the gold with an average of 16.566. He performed the hardest vault in the competition, a handspring triple full, which he originated. The vault warrants a difficulty score of 7.4. He followed up that vault with a Tsukahara triple full, worth 7.0.
At the 2010 World Championships in Rotterdam, he finished fourth in the vault event, just outside of the medals.
Hak Seon Yang has been quiet in 2012, but if he arrives in London in the same form as 2011, he will be difficult to beat on vault.