I am learning self defence. I don't intend to become a master at martial arts. So I think it is wise to keep things simple. I want to concentrate on a few basic moves, and learn them well. 

Should I learn this low kick? At 3:30 minutes. 
[Video: Bas Rutten vs Warpath][1]. Bas Rutten immobilises Warpath with a kick to the thigh muscle. 

I'm not sure how effective it would be in a real fight, and I don't see it being so devastatingly in MMA very often. Maybe it would only work if I had the exceptional leg power of Bas Rutten, which is never going to happen.


  [1]: https://youtu.be/5mzX_1Zcvcs?t=3m34s