1) Ukrainian surname 
[vault] Yurchenko is the name of both a specific vault and a vault family in artistic gymnastics. The Yurchenko was named after Soviet gymnast Natalia Yurchenko, who originated the vault in the early 1980s. In a Yurchenko vault, the gymnast does a round-off onto the springboard and a back handspring onto the horse or vaulting table. The gym...
vaulting style involving a round-off onto the springboard and a backflip onto the vaulting table