Ronda Rousey has been a prominent face in the Ultimate Fighting Championship (UFC) circuit in the last few years, having won all her 12 bouts since making her professional debut in 2011. However, prior to her foray into UFC, her fighting style had been as effective in the amateur circuit, where she trumped all three opponents she faced in her trademark armbar submission manoeuvre.
In this video from 2010, she is seen making her amateur Mixed Martial Arts (MMA) against Hayden Munoz in the Combat Fight League's Ground Zero. In less than 30 seconds, she brings down her opponent in an armbar hold, and leaves the official with no option but to ring the bell. Munoz is left subdued for some time, and has to be attended by medical professionals before she finally manages to stand back on her feet.