The best techniques for MMA, it's still a sport; more realistic than traditional boxing, but then that's a pretty low bar. I've been training martial arts for 25 years and I wouldn't put myself in there for all the money in the world. It's brutally violent, and the most successful fighters are very well trained and don't seem to give a shit about messing their opponents up for life; but it still has nothing to do with martial arts.

Wrapping your legs around your opponent's waist and rolling around on the ground for minutes ceases to be a good idea the second you leave the ring. While breaking fingers, ribs, poking eyes, punching throats and kicking knees and groins suddenly become viable options. In most cases; the sooner you can get the hell out of there the better, because the risk of getting into trouble increases fast in a street fight.