4. Flo vs. Kendra
As seen during: Season Four
Some time during Flo's stint on the series, she got into a fight with fellow cast member Amber that consisted of Flo hopping on a sprained ankle to attack Amber, then proceeding to grab the girl by the hair and toss her across the patio MMA-style.
Since YouTube has been forced to take that clip down for copyright reasons, the above clip will have to do. It's not MMA-worthy, but someone does insult Flo's age which incites her to go completely insane. Which still makes us thoroughly frightened of her. Twenty-six isn't old, Flo, so we're on your side. Please don't hurt us.