I run a blog that aims to teach people about the correct methods of self defence. My description on the site:

"Growing up on the gang-infested streets of Los Angeles not only gave Marc MacYoung his street name "Animal," but also extensive firsthand experience about what does and does not work for self-defense. What he teaches is based on experience and has proven reliability for surviving violence. If it didn't work, he wouldn't be alive to talk about it.

He is considered by many to be one of the most analytical thinkers on the subject of surviving violence and personal safety today. [Marc MacYoung at Cops International, Puck Poland 2003] He has taught police, military, martial artists and civilians around the world. His message is always the same: Hand-to-hand combat is a last ditch effort when other, more effective, preventive measures have failed."