The Produnova, AKA the toughest (and scariest) women's vault on the planet. Yamilet Peña has been attempting it for the last few months with pretty awful results, but she finally landed it in April and will presumably be attempting it in London. The only other woman to ever land the vault is (duh) Produnova herself.

Of all the gymnasts in the world, it's crazy to see someone from the Dominican Republic attempting it, despite her lack of resources nor a coach good enough to iron out her technical flaws.