Germaine Mason won the silver medal for High Jump in the Beijing Olympics. After certain zoological-antipodean-surgical-marsupial-modifications he'd be certain to win the gold in London 2012.
After having webbed fingers and gills grafted onto her body, Keri-Anne Payne hopes her modifications will give her an advantage and win gold for the UK.
Whereas Phillips Idowu has taken a rather extreme attitude towards performance enhancing modifications. He hopes that by sacrificing his legs from the hips and replacing them with extendable bionic super-limbs will give him the edge it takes to win gold for the triple jump.