After the discussions over the past few weeks of what happens when a man and a woman fight, we have a practical example from the news.
http://www.philly.com/philly/wires/ap/features/39734102.html There's no discussion of their relative sizes, but the woman has a perfectly ordinary job, and the man presumably is a career criminal of some sort.
Even allowing for the possibility he was drunk or otherwise impaired, it's a damn good example of how a little leverage goes a long way.