How do you kill the big metel ball swinging guard in Zelda twilight for wii?

When he raises his arms to do an attack, he's vulnerable to sWord attacks. Once you do enough damage he will roll into a ball. When he does this put on your iron boots, then grab and throw him like you did with the previous gorons. When you throw him he will roll into the lava. Repeat this until he is deafeted.