Just moments earlier Holly Robinson of New Zealand had set a new world record with a throw 43.32m, but Arnold responded in dramatic fashion, snatching the title away from her rival with her final throw.
On her performance, Arnold said: "It was a battle out there today. I knew that I could beat her (Robinson) and throw something like that. I gave it my all. I didn't want her to take my world record off me and I wanted to win the gold. I knew it was there, it just didn't click on the first few throws but on that last throw, I just gave it everything. Everything went well on that last throw. [Holly and I] are both great competitors and we both bring out the best in each other which is amazing for our sport.”
Watch Arnold claim the title and world record on the .
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