How exactly did Cena win by "falling down"?

I've seen it in a few of the answers on here. Can someone please explain?

Answers:

Did the undertake quit wwe?

He was super kicked and fell back on Orton and got the 3 count before HBK could break up the pin. So Cena won by default. After the match HBK said to Cena you don't deserve that pointing at the belt.

Points Baby!!

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Is anybody else disappointed with the royal rumble anthology dvd box set?

IDK,It's pretty gay how he won..Falling down,wtf is with that?

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