There's a lot of talk about what works in a real fight, so let's take a look at one of the MOST common scenarios where a regular person will get in a fight. Person A) picks a fight with person B) for dancing with "his" girl. Now, the way it generally goes is both fighters are untrained (let's assume you are trained) and scared of getting hit, so they are at a distance from each other. They will kind of box each other. This is where standup is handy to put the guy down immediately before he realizes he is outmatched if you are capable. If you get one or two hits on your opponent he is already pissed off and is not going to want to get hit again, so his response is to charge you. I have seen this a million times and it is what all untrained fighters do, if the initial couple of hits don't go their way they immediately sense their disadvantage and charge you. This is where standup becomes quite useless unless you get lucky and catch the guy before he gets to you. Now you need a ground game. The guy will tackle you and it becomes a wrestling match, generally with the guy who tackled you wildly grabbing and punching at random, but rarely with any clear purpose or devastating effect because they are fighting with rage and not with their heads. At this point anyone can either try overpowering the guy or if they have ground training can use that knowledge to quickly get the guy in a hold, knock him out, or if you're particularly cruel break something. Please feel free to critique this or add to the list of most common scenarios and how to prepare for them.