At RXF 15 Bucharest MMA All Stars, in Bucharest, Romania, heavyweights Robert Orbocea and Raul Sabou squared off, for six seconds. Sabou, seen in red fight shorts, lunged in with a ferocious left hook. It landed, and sweat flew from Orbocea's face.Then Sabou dropped, insensate. How did it happen?As Sabou lunged in, Orbocea faded back, and with his left arm extended awkwardly delivered a fist to the button. What looks at first like the result of a chin made of the finest, most fragile crystal, or maybe a partisan sniper in the audience, is actually part of an Eastern European boxing technique called Casting.It works, as you can see.