These two reverse hechts were performed by a junior elite gymnast still in the process of learning the skill. He misses the first turn and catches the second, and it seems that one of the main differences between both attempts was related to the direction of the arm throw to begin the flying phase.
Successful vaults come from mastering certain vaulting components along with personal power. These components are running, the hurdle, board contact, a first flying phase, table repulsion, and a second flying phase. Lack of power or poor technique in any of these vaulting components can result in costly mistakes.